net: bcmgenet: Remove duplicate test for tx_coalesce_usecs_high

We were checking twice for ec->tx_coalesce_usecs_high, remove the
duplicate test.
Reported-by: NJulia Lawall <julia.lawall@lip6.fr>
Reported-by: kbuild-all@01.org
Fixes: 2f913070 ("net: bcmgenet: Implement TX coalescing control knobs")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmgenet.c

@@ -608,8 +608,7 @@ static int bcmgenet_set_coalesce(struct net_device *dev,
 	 * transmitted, or when the ring is emtpy.
 	 */
 	if (ec->tx_coalesce_usecs || ec->tx_coalesce_usecs_high ||
-	    ec->tx_coalesce_usecs_irq || ec->tx_coalesce_usecs_high ||
-	    ec->tx_coalesce_usecs_low)
+	    ec->tx_coalesce_usecs_irq || ec->tx_coalesce_usecs_low)
 		return -EOPNOTSUPP;
 
 	/* Program all TX queues with the same values, as there is no