net: marvell: pxa168_eth: 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 is not relevant here).

  drivers/net/ethernet/marvell/pxa168_eth.c:1575:34: error: ‘pxa168_eth_of_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/pxa168_eth.c

@@ -1586,7 +1586,7 @@ static struct platform_driver pxa168_eth_driver = {
 	.suspend = pxa168_eth_suspend,
 	.driver = {
 		.name		= DRIVER_NAME,
-		.of_match_table	= of_match_ptr(pxa168_eth_of_match),
+		.of_match_table	= pxa168_eth_of_match,
 	},
 };