xilinx: versal: Skip store/restore of GIC during CPU idle
xilinx: versal: Skip store/restore of GIC during CPU idle

GIC registers needs to be stored/restored during system
suspend/resume only and not during CPU idle.
During CPU idle, minimum 1 CPU is in ON state.

Signed-off-by: Ravi Patel <e5b7d6ba70dd0e1988f80cbc03fc1c1bb1fd4ede@xilinx.com>
Signed-off-by: Rajan Vaja <958387e48e282671f29716c1b482329c5293cdb8@xilinx.com>
Change-Id: I5de2ce3a61bf4260f9385349202b0f592a47aaba

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware