V4L/DVB: v4l2_ctrl_get_name(): add missing control names, 	and make title for V4L2_CID_BG_COLOR consistent

v4l2_ctrl_get_name(): add missing control names, and make title for
V4L2_CID_BG_COLOR consistent

V4L2_CID_AUTOBRIGHTNESS   was introduced with kernel 2.6.31
V4L2_CID_BAND_STOP_FILTER was introduced with kernel 2.6.32
Signed-off-by: Frank Schaefer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>