ixgbe: Only set/clear VFE in ixgbe_set_rx_mode

There appears to be a stray setting of the VFE bit when registering vlans.
This should not be done as vlan filtering should be enabled any time the
interface is not in promiscous mode

Signed-off-by:  Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>