ixgbe: update set_rx_mode to fix issues w/ macvlan

This change corrects issues where macvlan was not correctly triggering
promiscuous mode on ixgbe due to the filters not being correctly set.  It
also corrects the fact that VF rar filters were being overwritten when the
PF was reset.

CC: Shirley Ma <xma@us.ibm.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>