dpaa_eth: use false and true for bool variables

Fix coccicheck warnings:

./dpaa_eth.c:2549:2-22: WARNING: Assignment of 0/1 to bool variable
./dpaa_eth.c:2562:2-22: WARNING: Assignment of 0/1 to bool variable

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Acked-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Link: https://lore.kernel.org/r/1604405100-33255-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -2545,7 +2545,7 @@ static void dpaa_eth_napi_enable(struct dpaa_priv *priv)
 	for_each_online_cpu(i) {
 		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
 
-		percpu_priv->np.down = 0;
+		percpu_priv->np.down = false;
 		napi_enable(&percpu_priv->np.napi);
 	}
 }
@@ -2558,7 +2558,7 @@ static void dpaa_eth_napi_disable(struct dpaa_priv *priv)
 	for_each_online_cpu(i) {
 		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
 
-		percpu_priv->np.down = 1;
+		percpu_priv->np.down = true;
 		napi_disable(&percpu_priv->np.napi);
 	}
 }