media: ov772x: constify ov772x_frame_intervals

The values on this array never changes. Make it const.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/ov772x.c

@@ -531,7 +531,7 @@ static const struct ov772x_win_size ov772x_win_sizes[] = {
 /*
  * frame rate settings lists
  */
-static unsigned int ov772x_frame_intervals[] = { 5, 10, 15, 20, 30, 60 };
+static const unsigned int ov772x_frame_intervals[] = { 5, 10, 15, 20, 30, 60 };
 
 /*
  * general function