media: i2c: mt9m111: drop of_match_ptr for ID table

The driver will match mostly by DT table (even thought there is regular
ID table) so there is little benefit in of_match_ptr (this also allows
ACPI matching via PRP0001, even though it might not be relevant here).
This also fixes !CONFIG_OF error:

  drivers/media/i2c/mt9m111.c:1370:34: error: ‘mt9m111_of_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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/i2c/mt9m111.c

@@ -1382,7 +1382,7 @@ MODULE_DEVICE_TABLE(i2c, mt9m111_id);
 static struct i2c_driver mt9m111_i2c_driver = {
 	.driver = {
 		.name = "mt9m111",
-		.of_match_table = of_match_ptr(mt9m111_of_match),
+		.of_match_table = mt9m111_of_match,
 	},
 	.probe		= mt9m111_probe,
 	.remove		= mt9m111_remove,