media: platform: ti: am437x: 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/ti/am437x/am437x-vpfe.c:2620:34: error: ‘vpfe_of_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/ti/am437x/am437x-vpfe.c

@@ -2630,7 +2630,7 @@ static struct platform_driver vpfe_driver = {
 	.driver = {
 		.name	= VPFE_MODULE_NAME,
 		.pm	= &vpfe_pm_ops,
-		.of_match_table = of_match_ptr(vpfe_of_match),
+		.of_match_table = vpfe_of_match,
 	},
 };