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/linux/skbuff.h b/include/linux/skbuff.h
index ae836fd..ba0f8e3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -738,7 +738,7 @@
 }
 
 /**
- *	skb_peek
+ *	skb_peek - peek at the head of an &sk_buff_head
  *	@list_: list to peek at
  *
  *	Peek an &sk_buff. Unlike most other operations you _MUST_
@@ -759,7 +759,7 @@
 }
 
 /**
- *	skb_peek_tail
+ *	skb_peek_tail - peek at the tail of an &sk_buff_head
  *	@list_: list to peek at
  *
  *	Peek an &sk_buff. Unlike most other operations you _MUST_