feat(plat/nxp/common): define default PSCI features if not defined

SoC code can define supported features, otherwise use default setting.

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I0f11498c1f7558ff0ec2d9b344f3f7a4f5489ced
1 file changed