audiovideo_V4L2: Added more pixel formats.

Added the rest of the YUYV ordering formats, and also YU12.

Change-Id: Id04a780b237c33e985c1750acf36eb925b65b042

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6883202
Patch from Andrew Chew <achew@nvidia.com>.
1 file changed