From Claudio's 1.17cm1 patch:
   - Added support to YUV422P
   - Enforced width/height limits in VIDIOCMCAPTURE
   - Minor cleanup

Mark's changes:
   - Added ov511_parse_data_yuv422() (Still needs some work)
   - Modified ov511_move_data(), GET_DEPTH(), and VIDIOCMCAPTURE for YUV422