media: renesas: rcar_drif: Drop of_match_ptr()

The device_driver structure's of_match_table field exists
unconditionally, so there's no need for of_match_ptr(). This fixes a
compiler warning when test-compiling on non-OF platforms:

drivers/media/platform/renesas/rcar_drif.c:1470:34: warning: unused variable 'rcar_drif_of_table' [-Wunused-const-variable]
static const struct of_device_id rcar_drif_of_table[] = {
                                 ^
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/renesas/rcar_drif.c

@@ -1472,7 +1472,7 @@ MODULE_DEVICE_TABLE(of, rcar_drif_of_table);
 static struct platform_driver rcar_drif_driver = {
 	.driver = {
 		.name = RCAR_DRIF_DRV_NAME,
-		.of_match_table = of_match_ptr(rcar_drif_of_table),
+		.of_match_table = rcar_drif_of_table,
 		.pm = &rcar_drif_pm_ops,
 		},
 	.probe = rcar_drif_probe,