Add mihawk platform to meta-ibm

The contents of this up-stream include the following items
1.Basic function
2.Led settings
3.GPIO monitor (id button and power supply)
4.Linux dts patch.

Change-Id: Id0d4fd06ed9a9d4abde6c2a68b0a709fde343f60
Signed-off-by: Ben Pai <Ben_Pai@wistron.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/mihawk/avsbus-enable@.service b/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/mihawk/avsbus-enable@.service
new file mode 100755
index 0000000..810c92e
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/chassis/avsbus-control/mihawk/avsbus-enable@.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=Enable the AVS bus on VRMs
+Wants=avsbus-disable@%i.service
+After=avsbus-disable@%i.service
+Conflicts=obmc-chassis-poweroff@%i.target
+ConditionPathExists=!/run/openbmc/chassis@%i-on
+
+[Service]
+ExecStart=/usr/bin/env avsbus-enable.sh
+SyslogIdentifier=avsbus-enable.sh
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=obmc-chassis-poweron@%i.target