Extend H264_I_PERIOD range

Built from:
a5e9dfc V4L2: Extend range for V4L2_CID_MPEG_VIDEO_H264_I_PERIOD
8f68232 Merge pull request #604 from 6by9/rpi-3.12.y-PR-140527
fd1355b V4L2: Add option to disable enum_framesizes.