net: phy: micrel: Add basic support for KSZ9131

This adds basic support for the new Micrel KSZ9131 phy.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
diff --git a/include/micrel.h b/include/micrel.h
index 1d121c2..f5126f2 100644
--- a/include/micrel.h
+++ b/include/micrel.h
@@ -26,6 +26,7 @@
 #define MII_KSZ9x31_SILICON_REV_MASK		0xfffff0
 
 #define PHY_ID_KSZ9031				0x00221620
+#define PHY_ID_KSZ9131				0x00221640
 
 
 /* Registers */
@@ -40,5 +41,6 @@
 			       int regnum, u16 mode, u16 val);
 int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
 			      int regnum, u16 mode);
+int ksz9xx1_phy_get_id(struct phy_device *phydev);
 
 #endif