macintosh: Add const to of_device_id

struct of_device_id should normally be const.
Signed-off-by: Xiang wangx <wangxiang@cdjrlc.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211205130925.28389-1-wangxiang@cdjrlc.com

drivers/macintosh/mediabay.c

@@ -703,7 +703,7 @@ static const struct mb_ops keylargo_mb_ops = {
  * Therefore we do it all by polling the media bay once each tick.
  */
 
-static struct of_device_id media_bay_match[] =
+static const struct of_device_id media_bay_match[] =
 {
 	{
 	.name		= "media-bay",