media: i2c: ov2640: 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/ov2640.c:1290:34: error: ‘ov2640_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/ov2640.c

@@ -1296,7 +1296,7 @@ MODULE_DEVICE_TABLE(of, ov2640_of_match);
 static struct i2c_driver ov2640_i2c_driver = {
 	.driver = {
 		.name = "ov2640",
-		.of_match_table = of_match_ptr(ov2640_of_match),
+		.of_match_table = ov2640_of_match,
 	},
 	.probe    = ov2640_probe,
 	.remove   = ov2640_remove,