drm/imx/dcss: Use dev_err_probe

This helps identifying problems with downstream pipeline devices, like
HDMI/DP output.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230717092950.448823-1-alexander.stein@ew.tq-group.com