[media] em28xx: add support for V4L2_PIX_FMT_SRGGB8

Adding support for SRGGB8 is as simple as adding a new entry at
struct em28xx_fmt.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/em28xx/em28xx-video.c

@@ -115,6 +115,11 @@ static struct em28xx_fmt format[] = {
 		.fourcc   = V4L2_PIX_FMT_RGB565,
 		.depth    = 16,
 		.reg      = EM28XX_OUTFMT_RGB_16_656,
+	}, {
+		.name     = "8 bpp Bayer RGRG..GBGB",
+		.fourcc   = V4L2_PIX_FMT_SRGGB8,
+		.depth    = 8,
+		.reg      = EM28XX_OUTFMT_RGB_8_RGRG,
 	}, {
 		.name     = "8 bpp Bayer BGBG..GRGR",
 		.fourcc   = V4L2_PIX_FMT_SBGGR8,