net: Fix first line of kernel-doc for a few functions

The function name must be followed by a space, hypen, space, and a
short description.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sock.h b/include/net/sock.h
index c8d4000..580d51fa 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1049,7 +1049,7 @@
 extern void sock_init_data(struct socket *sock, struct sock *sk);
 
 /**
- *	sk_filter_release: Release a socket filter
+ *	sk_filter_release - release a socket filter
  *	@fp: filter to remove
  *
  *	Remove a filter from a socket and release its resources.