linux-imx

gpu: ipu-v3: ipu-dc: don't bug out on invalid bus_format

If imx-drm is combined with a bridge or panel that requests an
unsupported format, warn and use a default mapping instead of
hanging the machine. The worst that can happen here are wrong
colors.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>