Enable reset controller to be prepared for use.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/4fb62952f61e5046d750fff0e3e469c7abd1d0d0.1611224800.git.michal.simek@xilinx.comReviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>