feat(drivers/scmi-msg): add power domain protocol

Add SCMI power domain protocol, with POWER_STATE_NOTIFY and
POWER_STATE_CHANGE_REQUESTED_NOTIFY not implemented.

Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Change-Id: Ia7c4db57c4c702667f8eaa630c924016e4a8bde0
4 files changed