igb: add 82576 MAC support

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/igb/e1000_mac.h b/drivers/net/igb/e1000_mac.h
index 326b659..dc2f8cc 100644
--- a/drivers/net/igb/e1000_mac.h
+++ b/drivers/net/igb/e1000_mac.h
@@ -94,5 +94,6 @@
 #define E1000_HICR_C               0x02
 
 extern void e1000_init_function_pointers_82575(struct e1000_hw *hw);
+extern u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr);
 
 #endif