i40e: clear NVM update state on ethtool test

Once in a great while the NVMUpdate tools and the driver get out
of phase with each other.  This gives us a way to reset things
without having to unload the driver.

Change-ID: I353f688236249a666a90ba3e7233e0ed8c1a04e9
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

@@ -1393,6 +1393,9 @@ static int i40e_eeprom_test(struct net_device *netdev, u64 *data)
 	netif_info(pf, hw, netdev, "eeprom test\n");
 	*data = i40e_diag_eeprom_test(&pf->hw);
 
+	/* forcebly clear the NVM Update state machine */
+	pf->hw.nvmupd_state = I40E_NVMUPD_STATE_INIT;
+
 	return *data;
 }