staging: media: rpivid: Reduce the alignment on height to 2

There is no need for the column stride to be a multiple of 16,
so reduce it down to a multiple of 2 as it is YUV420.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

drivers/staging/media/rpivid/rpivid_video.c

@@ -133,8 +133,8 @@ static void rpivid_prepare_dst_format(struct v4l2_pix_format_mplane *pix_fmt)
 		/* Width rounds up to columns */
 		width = ALIGN(width, 128);
 
-		/* 16 aligned height - not sure we even need that */
-		height = ALIGN(height, 16);
+		/* 2 aligned height - as it will be YUV420 */
+		height = ALIGN(height, 2);
 		/* column height
 		 * Accept suggested shape if at least min & < 2 * min
 		 */