[media] v4l: vsp1: Fix RPF cropping

The RPF cropping offset for the chroma planes is incorrectly computed,
it needs to be divided by the horizontal subsampling factor.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/vsp1/vsp1_rpf.c

@@ -105,7 +105,8 @@ static void rpf_configure(struct vsp1_entity *entity,
 
 	if (format->num_planes > 1) {
 		rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
-				+ crop->left * fmtinfo->bpp[1] / 8;
+				+ crop->left / fmtinfo->hsub * fmtinfo->bpp[1]
+				/ 8;
 		pstride |= format->plane_fmt[1].bytesperline
 			<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
 	} else {