e1000e: always set transmit descriptor control registers the same

The hardware erratum workaround where the TXDCTL register must be the same
setting for both queues should always be done.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -2817,9 +2817,9 @@ static void e1000_configure_tx(struct e1000_adapter *adapter)
 		 */
 		txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
 		ew32(TXDCTL(0), txdctl);
-		/* erratum work around: set txdctl the same for both queues */
-		ew32(TXDCTL(1), txdctl);
 	}
+	/* erratum work around: set txdctl the same for both queues */
+	ew32(TXDCTL(1), er32(TXDCTL(0)));
 
 	/* Program the Transmit Control Register */
 	tctl = er32(TCTL);