linux-phytec-fsl

ARM: tegra: add system-power-controller property for PMIC node

Add system-power-controller property to system PMIC, ams AS3722,
node to enable power off functionality through PMIC.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>