igb: correct issue of set_mta member of mac.ops not being populated

The igb_mta_set function was not being correctly used

Signed-off-by: Alexander Duyck <alexander.h.duyck@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.c b/drivers/net/igb/e1000_mac.c
index 20408aa..9b0f0af 100644
--- a/drivers/net/igb/e1000_mac.c
+++ b/drivers/net/igb/e1000_mac.c
@@ -271,7 +271,7 @@
  *  current value is read, the new bit is OR'd in and the new value is
  *  written back into the register.
  **/
-static void igb_mta_set(struct e1000_hw *hw, u32 hash_value)
+void igb_mta_set(struct e1000_hw *hw, u32 hash_value)
 {
 	u32 hash_bit, hash_reg, mta;