meta-ampere: Initial AmpereOne(TM) Mt. Mitchell's non-DC-SCM BMC support

Add new Mt.Mitchell platform with basic features so that it can be
compiled and works.

Tested:
1. Compile for Mt.Mitchell successful.
2. Flash and check for the firmware can boot on the Mt.Mitchell
non-DC-SCM system without issue

Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
Change-Id: I8dc9db9029b27c0c6325c31d368cdbb614a3c8b6
diff --git a/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
new file mode 100644
index 0000000..13ed796
--- /dev/null
+++ b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS:append := "${THISDIR}/${PN}:"
+
diff --git a/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/channel_config.json b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/channel_config.json
new file mode 100644
index 0000000..4998665
--- /dev/null
+++ b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/channel_config.json
@@ -0,0 +1,178 @@
+{
+  "0" : {
+    "name" : "IPMB",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "ipmb",
+      "protocol_type" : "ipmb-1.0",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "1" : {
+    "name" : "eth0",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "lan-802.3",
+      "protocol_type" : "ipmb-1.0",
+      "session_supported" : "multi-session",
+      "is_ipmi" : true
+    }
+  },
+  "2" : {
+    "name" : "eth1",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "lan-802.3",
+      "protocol_type" : "ipmb-1.0",
+      "session_supported" : "multi-session",
+      "is_ipmi" : true
+    }
+  },
+  "3" : {
+    "name" : "usb0",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "lan-802.3",
+      "protocol_type" : "ipmb-1.0",
+      "session_supported" : "multi-session",
+      "is_ipmi" : true
+    }
+  },
+  "4" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "5" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "6" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "7" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "8" : {
+    "name" : "INTRABMC",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "oem",
+      "protocol_type" : "oem",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "9" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "10" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "11" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "12" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "13" : {
+    "name" : "RESERVED",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "reserved",
+      "protocol_type" : "na",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "14" : {
+    "name" : "SELF",
+    "is_valid" : false,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "ipmb",
+      "protocol_type" : "ipmb-1.0",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  },
+  "15" : {
+    "name" : "ipmi_ssif",
+    "is_valid" : true,
+    "active_sessions" : 0,
+    "channel_info" : {
+      "medium_type" : "smbus-v2.0",
+      "protocol_type" : "ipmi-smbus",
+      "session_supported" : "session-less",
+      "is_ipmi" : true
+    }
+  }
+}
diff --git a/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/dev_id.json b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/dev_id.json
new file mode 100644
index 0000000..8e89732
--- /dev/null
+++ b/meta-ampere/meta-mitchell/recipes-phosphor/ipmi/phosphor-ipmi-config/dev_id.json
@@ -0,0 +1,2 @@
+{"id": 32, "revision": 1, "addn_dev_support": 141,
+    "manuf_id": 52538, "prod_id": 131, "aux": 0}