sock.h: fix kernel-doc warning

Fix sock.h kernel-doc warning:
Warning(include/net/sock.h:1438): No description found for parameter 'wq'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/sock.h

@@ -1412,7 +1412,7 @@ static inline int sk_has_allocations(const struct sock *sk)
 
 /**
  * wq_has_sleeper - check if there are any waiting processes
- * @sk: struct socket_wq
+ * @wq: struct socket_wq
  *
  * Returns true if socket_wq has waiting processes
  *