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/leds/ampere-led-manager-config/led.yaml b/meta-ampere/meta-mitchell/recipes-phosphor/leds/ampere-led-manager-config/led.yaml
new file mode 100644
index 0000000..3e321ed
--- /dev/null
+++ b/meta-ampere/meta-mitchell/recipes-phosphor/leds/ampere-led-manager-config/led.yaml
@@ -0,0 +1,32 @@
+bmc_booted:
+    power:
+        Action: 'Blink'
+        DutyOn: 50
+        Period: 1000
+        Priority: 'On'
+
+power_on:
+    power:
+        Action: 'On'
+        DutyOn: 50
+        Period: 0
+        Priority: 'On'
+
+systemFault:
+    fault:
+        Action: 'On'
+        DutyOn: 50
+        Period: 0
+        Priority: 'Blink'
+
+enclosure_identify:
+    identify:
+        Action: 'On'
+        DutyOn: 50
+        Period: 1000
+
+enclosure_identify_blink:
+    identify:
+        Action: 'Blink'
+        DutyOn: 50
+        Period: 1000