[NET]: Remove HIPPI private from skbuff.h

This removes the private element from skbuff, that is only used by
HIPPI. Instead it uses skb->cb[] to hold the additional data that is
needed in the output path from hard_header to device driver.

PS: The only qdisc that might potentially corrupt this cb[] is if
netem was used over HIPPI. I will take care of that by fixing netem
to use skb->stamp. I don't expect many users of netem over HIPPI

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/hippidevice.h b/include/linux/hippidevice.h
index 9debe6b..9bc3b68 100644
--- a/include/linux/hippidevice.h
+++ b/include/linux/hippidevice.h
@@ -26,6 +26,11 @@
 #include <linux/if_hippi.h>
 
 #ifdef __KERNEL__
+
+struct hippi_cb {
+	__u32	ifield;
+};
+
 extern unsigned short hippi_type_trans(struct sk_buff *skb,
 				       struct net_device *dev);
 
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f10a8b9..4aeadb1 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -193,7 +193,6 @@
  *	@nfct: Associated connection, if any
  *	@nfctinfo: Relationship of this skb to the connection
  *	@nf_bridge: Saved data about a bridged frame - see br_netfilter.c
- *      @private: Data which is private to the HIPPI implementation
  *	@tc_index: Traffic control index
  *	@tc_verd: traffic control verdict
  */
@@ -265,11 +264,6 @@
 	struct nf_bridge_info	*nf_bridge;
 #endif
 #endif /* CONFIG_NETFILTER */
-#if defined(CONFIG_HIPPI)
-	union {
-		__u32		ifield;
-	} private;
-#endif
 #ifdef CONFIG_NET_SCHED
        __u32			tc_index;        /* traffic control index */
 #ifdef CONFIG_NET_CLS_ACT