net: bridge: return false in br_mrp_enabled()

Fix the following coccicheck warning:

net/bridge/br_private.h:1334:8-9: WARNING: return of 0/1 in function
'br_mrp_enabled' with return type bool

Fixes: 65369933 ("bridge: mrp: Integrate MRP into the bridge")
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_private.h

@@ -1331,7 +1331,7 @@ static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
 
 static inline bool br_mrp_enabled(struct net_bridge *br)
 {
-	return 0;
+	return false;
 }
 
 static inline void br_mrp_port_del(struct net_bridge *br,