ixgbevf: Link lost in VM on ixgbevf when restoring from freeze or suspend

This patch fixed issue in VM which shows no link when hypervisor is
restored from low-power state. The driver is responsible for re-enabling
any features of the device that had been disabled during suspend calls,
such as IRQs and bus mastering.
Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -2517,6 +2517,7 @@ void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
 		msleep(1);
 
 	ixgbevf_down(adapter);
+	pci_set_master(adapter->pdev);
 	ixgbevf_up(adapter);
 
 	clear_bit(__IXGBEVF_RESETTING, &adapter->state);