e1000: add support for i225-IT

This patch adds support for i225-IT in e1000 driver.
Add e1000_phy_igc.

Signed-off-by: Marjolaine Amate <marjolaine.amate@odyssee-systemes.fr>
diff --git a/drivers/net/e1000.h b/drivers/net/e1000.h
index f788394..e131112 100644
--- a/drivers/net/e1000.h
+++ b/drivers/net/e1000.h
@@ -212,6 +212,7 @@
 	e1000_phy_igp_3,
 	e1000_phy_ife,
 	e1000_phy_igb,
+	e1000_phy_igc,
 	e1000_phy_bm,
 	e1000_phy_undefined = 0xFF
 } e1000_phy_type;
@@ -2420,6 +2421,7 @@
 #define BME1000_E_PHY_ID     0x01410CB0
 
 #define I210_I_PHY_ID		0x01410C00
+#define I225_I_PHY_ID		0x67C9DCC0
 
 /* Miscellaneous PHY bit definitions. */
 #define PHY_PREAMBLE			0xFFFFFFFF