control: Temporarily handle starting at poweron

For JSON based fan control the fan control init service is used to start
fan control at poweron. The associated recipe needs to be updated where
JSON based fan control only uses the non-init service and have it start
at BMC standby. Once that is merged, this commit can be reverted.

Change-Id: I893b8b8f2f73ef5ef842a3b7733c24c426df00e6
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed