amd-xgbe: Use disable_irq_nosync from within timer function

Since the Tx timer function runs in softirq context the driver needs
to call disable_irq_nosync instead of a disable_irq.
Reported-by: NJosh Stone <jistone@redhat.com>
Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/xgbe/xgbe-drv.c

@@ -423,7 +423,7 @@ static void xgbe_tx_timer(unsigned long data)
 	if (napi_schedule_prep(napi)) {
 		/* Disable Tx and Rx interrupts */
 		if (pdata->per_channel_irq)
-			disable_irq(channel->dma_irq);
+			disable_irq_nosync(channel->dma_irq);
 		else
 			xgbe_disable_rx_tx_ints(pdata);