This adds linear 16x16 NV12 tiled format. This format is exposed by Conexant Video Capture cards and also Allwinner V3s CSI device. Note that V4L2 exported the format as V4L2_PIX_FMT_HM12, prior to being converted to NV12_16L16 nomenclature.
Signed-off-by: Ezequiel Garcia ezequiel@collabora.com