[NET]: Fix dev_alloc_skb() typo.

Noticed by Joe Perches.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 6ef7008..e425921 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -279,7 +279,7 @@
 {
 	/*
 	 * There is more code here than it seems:
-	 * __def_alloc_skb is an inline
+	 * __dev_alloc_skb is an inline
 	 */
 	return __dev_alloc_skb(length, GFP_ATOMIC);
 }