This patch supports VIDIOC_ENUM_FMT, VIDIOC_ENUM_FRAMESIZES and VIDIOC_DBG_G_CHIP_IDENT ioctrls. Signed-off-by: Liu Ying <b17645@freescale.com> (cherry picked from commit 90fdf1cded2ce26ac6e8c81944a78a3f998ddaf2)