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-ampere/platform/ampere-platform-init.bb b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init.bb
new file mode 100644
index 0000000..dd5f599
--- /dev/null
+++ b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init.bb
@@ -0,0 +1,35 @@
+SUMMARY = "Phosphor OpenBMC Platform Init Service"
+DESCRIPTION = "Phosphor OpenBMC Platform Init Daemon"
+
+PR = "r1"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+inherit systemd
+inherit obmc-phosphor-systemd
+
+DEPENDS += "systemd"
+RDEPENDS:${PN} += "libsystemd"
+RDEPENDS:${PN} += "bash"
+
+SRC_URI = " \
+           file://ampere-platform-init.service \
+           file://ampere-bmc-heartbeat.service \
+           file://ampere_platform_init.sh \
+           file://ampere_bmc_heartbeat.sh \
+           file://${MACHINE}_platform_gpios_init.sh \
+           file://gpio-lib.sh \
+          "
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE:${PN} = "ampere-platform-init.service ampere-bmc-heartbeat.service"
+
+do_install () {
+    install -d ${D}${sbindir}
+    install -m 0755 ${WORKDIR}/gpio-lib.sh ${D}${sbindir}/
+    install -m 0755 ${WORKDIR}/ampere_platform_init.sh ${D}${sbindir}/
+    install -m 0755 ${WORKDIR}/ampere_bmc_heartbeat.sh ${D}${sbindir}/
+    install -m 0755 ${WORKDIR}/${MACHINE}_platform_gpios_init.sh ${D}${sbindir}/platform_gpios_init.sh
+    install -d ${D}${systemd_unitdir}/system/
+    install -m 0644 ${WORKDIR}/ampere-platform-init.service ${D}${systemd_unitdir}/system
+}
+