uboot-phytec

MLK-23574-9 imx8qm/imx8qxp: Power down the resources before SPL jump to u-boot

Make sure that all devices that are powered up by SPL are powered down
before entering into the u-boot. Otherwise the subsystem/device will never
be powered down by SCFW, due to SPL and u-boot are in different partitions.

Benefiting from power domain driver, this patch implements the function
"power_off_pd_devices" to power off all active devices.

Signed-off-by: Ye Li <ye.li@nxp.com>