net: phy: supplement support for Micrel's KSZ9031

Add function ksz9031_phy_extended_write and ksz9031_phy_extended_read

Signed-off-by: Leo Sartre <lsartre@adeneo-embedded.com>
diff --git a/include/micrel.h b/include/micrel.h
index 25e8a46..e1c62d8 100644
--- a/include/micrel.h
+++ b/include/micrel.h
@@ -8,9 +8,20 @@
 #define MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW	0x105
 #define MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW	0x106
 #define MII_KSZ9021_EXT_ANALOG_TEST		0x107
+/* Register operations */
+#define MII_KSZ9031_MOD_REG			0x0000
+/* Data operations */
+#define MII_KSZ9031_MOD_DATA_NO_POST_INC	0x4000
+#define MII_KSZ9031_MOD_DATA_POST_INC_RW	0x8000
+#define MII_KSZ9031_MOD_DATA_POST_INC_W		0xC000
 
 struct phy_device;
 int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val);
 int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum);
 
+int ksz9031_phy_extended_write(struct phy_device *phydev, int devaddr,
+			       int regnum, u16 mode, u16 val);
+int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
+			      int regnum, u16 mode);
+
 #endif