[NET]: Fix kernel-doc for skb_segment

The kernel-doc comment for skb_segment is clearly wrong.  This states
what it actually does.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 0d0fd28..6087013 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2131,8 +2131,8 @@
  *	@features: features for the output path (see dev->features)
  *
  *	This function performs segmentation on the given skb.  It returns
- *	the segment at the given position.  It returns NULL if there are
- *	no more segments to generate, or when an error is encountered.
+ *	a pointer to the first in a list of new skbs for the segments.
+ *	In case of error it returns ERR_PTR(err).
  */
 struct sk_buff *skb_segment(struct sk_buff *skb, int features)
 {