[SK_BUFF]: Use skb_reset_network_header in skb_push cases

skb_push updates and returns skb->data, so we can just call
skb_reset_network_header after the call to skb_push.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
index d419e15..eaaf356 100644
--- a/net/ipv4/xfrm4_mode_beet.c
+++ b/net/ipv4/xfrm4_mode_beet.c
@@ -40,7 +40,8 @@
 	if (unlikely(optlen))
 		hdrlen += IPV4_BEET_PHMAXLEN - (optlen & 4);
 
-	skb->nh.raw = skb_push(skb, x->props.header_len + hdrlen);
+	skb_push(skb, x->props.header_len + hdrlen);
+	skb_reset_network_header(skb);
 	top_iph = skb->nh.iph;
 	skb->h.raw += sizeof(*iph) - hdrlen;