media: platform: mdp3: drop of_match_ptr for ID table

The driver can match only via the DT table so the table should be always
used and the of_match_ptr does not have any sense (this also allows ACPI
matching via PRP0001, even though it might not be relevant here).  This
also fixes !CONFIG_OF error:

  drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c:49:34: error: ‘mdp_of_ids’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c

@@ -322,7 +322,7 @@ static struct platform_driver mdp_driver = {
 	.driver = {
 		.name	= MDP_MODULE_NAME,
 		.pm	= &mdp_pm_ops,
-		.of_match_table = of_match_ptr(mdp_of_ids),
+		.of_match_table = mdp_of_ids,
 	},
 };