meta-bletchley: introduce bletchley-system-state-init

Because Bletchley does not have IPMI between Bmc & Host, the Host init
state will set to Off after Bmc booted. We require an extra service to
check and set Host state & Chassis power state to correct state before
doing any power action or power policy restore.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I680bc62559ea6f7df6dbe171b54d2cda0c7ae0d4