[media] soc-camera: Fix bytes per line computation for planar formats

The V4L2 specification defines bytesperline for planar formats as the
number of bytes per line for the largest plane. Modify
soc_mbus_bytes_per_line() accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/soc_mediabus.c

@@ -378,6 +378,9 @@ EXPORT_SYMBOL(soc_mbus_samples_per_pixel);
 
 s32 soc_mbus_bytes_per_line(u32 width, const struct soc_mbus_pixelfmt *mf)
 {
+	if (mf->layout != SOC_MBUS_LAYOUT_PACKED)
+		return width * mf->bits_per_sample / 8;
+
 	switch (mf->packing) {
 	case SOC_MBUS_PACKING_NONE:
 		return width * mf->bits_per_sample / 8;