drm/imx: parallel-display: remove dead code

The 'mode_valid' flag is never set in this driver. Remove it and the
code that depends on it.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
1 file changed