[NETLINK]: remove third bogus argument from NLA_PUT_FLAG

This patch removes the 'value' argument from NLA_PUT_FLAG which is
unused anyway. The documentation comment was already correct so it
doesn't need an update :)
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netlink.h

@@ -828,7 +828,7 @@ static inline int nla_put_msecs(struct sk_buff *skb, int attrtype,
 #define NLA_PUT_STRING(skb, attrtype, value) \
 	NLA_PUT(skb, attrtype, strlen(value) + 1, value)
 
-#define NLA_PUT_FLAG(skb, attrtype, value) \
+#define NLA_PUT_FLAG(skb, attrtype) \
 	NLA_PUT(skb, attrtype, 0, NULL)
 
 #define NLA_PUT_MSECS(skb, attrtype, jiffies) \