imx: power-domain: Convert to use livetree API for fdt access

Convert to using livetree API functions.

Without this if livetree is enabled (OF_LIVE) the imx8m-power-domain
driver will (silently) fail to probe its children leaving you with
no power domain support causing issues with certain devices.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
1 file changed