xilinx: versal: Add set wakeup source API

Implement set wakeup source API to pass SMC
call for set wakeup source to PLM (Platform Loader
and Manager).

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I654ce07235c0fc7dfcb81bf98820153255f61537
4 files changed