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/include/linux/netdevice.h b/include/linux/netdevice.h
index 34f3abc..1d92acc 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1132,7 +1132,7 @@
 	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;