net: stmmac: generic: 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/stmicro/stmmac/dwmac-generic.c:72:34: error: ‘dwmac_generic_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/stmicro/stmmac/dwmac-generic.c

@@ -91,7 +91,7 @@ static struct platform_driver dwmac_generic_driver = {
 	.driver = {
 		.name           = STMMAC_RESOURCE_NAME,
 		.pm		= &stmmac_pltfr_pm_ops,
-		.of_match_table = of_match_ptr(dwmac_generic_match),
+		.of_match_table = dwmac_generic_match,
 	},
 };
 module_platform_driver(dwmac_generic_driver);