[][Add sgmii pn_swap mode support for mt7981 eth]

[Description]
Add sgmii pn_swap mode support for mt7981 eth

[Release-log]
N/A

Change-Id: Ie29910dff4272b562a2af9d62812cfddcc8a7c3c
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4809853
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index d39464d..a6995df 100755
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -690,6 +690,11 @@
 #define SGMSYS_QPHY_PWR_STATE_CTRL 0xe8
 #define	SGMII_PHYA_PWD		BIT(4)
 
+/* Register to QPHY wrapper control */
+#define SGMSYS_QPHY_WRAP_CTRL	0xec
+#define SGMII_PN_SWAP_MASK	GENMASK(1, 0)
+#define SGMII_PN_SWAP_TX_RX	(BIT(0) | BIT(1))
+
 /* Infrasys subsystem config registers */
 #define INFRA_MISC2            0x70c
 #define CO_QPHY_SEL            BIT(0)
@@ -1110,6 +1115,7 @@
 #define MTK_SGMII_PHYSPEED_MASK        GENMASK(2, 0)
 #define MTK_SGMII_PHYSPEED_1000        BIT(0)
 #define MTK_SGMII_PHYSPEED_2500        BIT(1)
+#define MTK_SGMII_PN_SWAP	       BIT(16)
 #define MTK_HAS_FLAGS(flags, _x)       (((flags) & (_x)) == (_x))
 
 /* struct mtk_sgmii -  This is the structure holding sgmii regmap and its