drm/mipi-dsi: add RGB101010 pixel format

drm/mipi-dsi: add RGB101010 pixel format

Add MIPI_DSI_FMT_RGB101010 for 30 bit (10,10,10 RGB) pixel format,
corresponding to the packed 30 bit pixel stream defined in MIPI DSI
v1.3 Section 8.8.17.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Patchwork: https://patchwork.freedesktop.org/patch/713714/
Link: https://lore.kernel.org/r/20260324-dsi-rgb101010-support-v5-1-ff6afc904115@pm.me
[Acked by Maxime to be merged through msm-next on IRC on dri-devel]
[DB: moved RGB101010 to the end of enum mipi_dsi_pixel_format]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>