[media] Staging: media: bcm2048: defined region_configs[] array as const array

This patch defines region_configs[] array as const array since it
is not changed anywhere in code.
Signed-off-by: NClaudiu Beznea <claudiu.beznea@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/staging/media/bcm2048/radio-bcm2048.c

@@ -308,7 +308,7 @@ module_param(radio_nr, int, 0);
 MODULE_PARM_DESC(radio_nr,
 		 "Minor number for radio device (-1 ==> auto assign)");
 
-static struct region_info region_configs[] = {
+static const struct region_info region_configs[] = {
 	/* USA */
 	{
 		.channel_spacing	= 20,