meta-bletchley: motor-ctrl: add host ac-on and ac-off service

1. add host-ac-on and host-ac-off service.
2. init host-ac-on during BMC boot.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: Ie3954297e20f35c9d1f723d9d5e74cee91ec32ac
diff --git a/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/host-ac-off@.service b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/host-ac-off@.service
new file mode 100644
index 0000000..3962613
--- /dev/null
+++ b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/host-ac-off@.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Turn off AC at Sled%i
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/power-ctrl sled%i ac-off
+SyslogIdentifier=power-ctrl