igb: remove unused vmolr value

In an earlier version of igb_write_mc_addr_list() the vmolr register
was modified. This register is no longer accessed, although the variable
still exists. This patch removes it from the function.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/igb_main.c

@@ -2883,7 +2883,6 @@ static int igb_write_mc_addr_list(struct net_device *netdev)
 	struct e1000_hw *hw = &adapter->hw;
 	struct dev_mc_list *mc_ptr = netdev->mc_list;
 	u8  *mta_list;
-	u32 vmolr = 0;
 	int i;
 
 	if (netdev_mc_empty(netdev)) {
@@ -2897,9 +2896,6 @@ static int igb_write_mc_addr_list(struct net_device *netdev)
 	if (!mta_list)
 		return -ENOMEM;
 
-	/* set vmolr receive overflow multicast bit */
-	vmolr |= E1000_VMOLR_ROMPE;
-
 	/* The shared function expects a packed array of only addresses. */
 	mc_ptr = netdev->mc_list;