video: fm2fb: constify zorro_device_id

zorro_device_id are not supposed to change at runtime. All functions
working with zorro_device_id provided by <linux/zorro.h> work with
const zorro_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/fm2fb.c

@@ -213,7 +213,7 @@ static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 
 static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id);
 
-static struct zorro_device_id fm2fb_devices[] = {
+static const struct zorro_device_id fm2fb_devices[] = {
 	{ ZORRO_PROD_BSC_FRAMEMASTER_II },
 	{ ZORRO_PROD_HELFRICH_RAINBOW_II },
 	{ 0 }