NET: sungem, use spin_trylock_irqsave

Use spin_trylock_irqsave instead of open-coded
local_irq_save+spin_trylock.

Signed-off-by: Jiri Slaby <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/sungem.c

···
 			(csum_stuff_off << 21));
 	}
 
-	local_irq_save(flags);
-	if (!spin_trylock(&gp->tx_lock)) {
+	if (!spin_trylock_irqsave(&gp->tx_lock, flags)) {
 		/* Tell upper layer to requeue */
-		local_irq_restore(flags);
 		return NETDEV_TX_LOCKED;
 	}
 	/* We raced with gem_do_stop() */