media: saa7115: make static read-only array lcr2vbi const

The static array lcr2vbi is read-only so it make sense to make
it const.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/saa7115.c

@@ -1129,7 +1129,7 @@ static void saa711x_set_lcr(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_forma
 
 static int saa711x_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *sliced)
 {
-	static u16 lcr2vbi[] = {
+	static const u16 lcr2vbi[] = {
 		0, V4L2_SLICED_TELETEXT_B, 0,	/* 1 */
 		0, V4L2_SLICED_CAPTION_525,	/* 4 */
 		V4L2_SLICED_WSS_625, 0,		/* 5 */