i40evf: Add longer wait after remove module

Upon module remove, wait a little longer after requesting a reset before
checking to see if the firmware responded. This change prevents double
resets when the firmware is busy.

Change-ID: Ieedc988ee82fac1f32a074bf4d9e4dba426bfa58
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40evf/i40evf_main.c

@@ -2854,11 +2854,11 @@ static void i40evf_remove(struct pci_dev *pdev)
 	adapter->state = __I40EVF_REMOVE;
 	adapter->aq_required = 0;
 	i40evf_request_reset(adapter);
-	msleep(20);
+	msleep(50);
 	/* If the FW isn't responding, kick it once, but only once. */
 	if (!i40evf_asq_done(hw)) {
 		i40evf_request_reset(adapter);
-		msleep(20);
+		msleep(50);
 	}
 
 	if (adapter->msix_entries) {