net: mtk_eth_soc: remove unnecessary checks in mtk_mac_config()

mtk_mac_config() checks that the interface mode is permitted for the
capabilities, but we already do these checks in mtk_add_mac() when
initialising phylink's supported_interfaces bitmap. Remove the
unnecessary tests.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -458,12 +458,6 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		/* Setup soc pin functions */
 		switch (state->interface) {
 		case PHY_INTERFACE_MODE_TRGMII:
-			if (mac->id)
-				goto err_phy;
-			if (!MTK_HAS_CAPS(mac->hw->soc->caps,
-					  MTK_GMAC1_TRGMII))
-				goto err_phy;
-			fallthrough;
 		case PHY_INTERFACE_MODE_RGMII_TXID:
 		case PHY_INTERFACE_MODE_RGMII_RXID:
 		case PHY_INTERFACE_MODE_RGMII_ID:
@@ -480,11 +474,9 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		case PHY_INTERFACE_MODE_1000BASEX:
 		case PHY_INTERFACE_MODE_2500BASEX:
 		case PHY_INTERFACE_MODE_SGMII:
-			if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
-				err = mtk_gmac_sgmii_path_setup(eth, mac->id);
-				if (err)
-					goto init_err;
-			}
+			err = mtk_gmac_sgmii_path_setup(eth, mac->id);
+			if (err)
+				goto init_err;
 			break;
 		case PHY_INTERFACE_MODE_GMII:
 			if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) {