net: Convert struct net_device uc_promisc to bool

No need to use int, its uses are boolean.
May save a few bytes one day.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 9444c5c..17d67b5 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4497,10 +4497,10 @@
 		 */
 		if (!netdev_uc_empty(dev) && !dev->uc_promisc) {
 			__dev_set_promiscuity(dev, 1);
-			dev->uc_promisc = 1;
+			dev->uc_promisc = true;
 		} else if (netdev_uc_empty(dev) && dev->uc_promisc) {
 			__dev_set_promiscuity(dev, -1);
-			dev->uc_promisc = 0;
+			dev->uc_promisc = false;
 		}
 
 		if (ops->ndo_set_multicast_list)