feat(rmm): add psci api to realms

add wrappers for PSCI APIs
CPU_ON
CPU_OFF
PSCI_AFFINITY_INFO
PSCI_FEATURES

Signed-off-by: Shruti Gupta <shruti.gupta@arm.com>
Change-Id: Ice7bc03d052a0726163c7a31a32f59688e7f516b
4 files changed