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>

include/linux/netdevice.h

@@ -1132,7 +1132,7 @@ struct net_device {
 	spinlock_t		addr_list_lock;
 	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
 	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
-	int			uc_promisc;
+	bool			uc_promisc;
 	unsigned int		promiscuity;
 	unsigned int		allmulti;
 

net/core/dev.c

@@ -4497,10 +4497,10 @@ void __dev_set_rx_mode(struct net_device *dev)
 		 */
 		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)