[SK_BUFF] kernel-doc: fix skbuff warnings

Add kernel-doc to skbuff.h, skbuff.c to eliminate kernel-doc warnings.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 02cd4cd..ef9d46b 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -122,6 +122,8 @@
  *	__alloc_skb	-	allocate a network buffer
  *	@size: size to allocate
  *	@gfp_mask: allocation mask
+ *	@fclone: allocate from fclone cache instead of head cache
+ *		and allocate a cloned (child) skb
  *
  *	Allocate a new &sk_buff. The returned buffer has no headroom and a
  *	tail room of size bytes. The object has a reference count of one.