Also, link SRC to IPU via phandle.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Reviewed-by: NMarek Vasut <marex@denx.de>
Reviewed-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>