[NET]: Correct two mistaken skb_reset_mac_header() conversions.

This operation helper abstracts:

	skb->mac_header = skb->data;

but it was done in two more places which were actually:

	skb->mac_header = skb->network_header;

and those are corrected here.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
index 8c68da5..6caf459 100644
--- a/net/netrom/nr_dev.c
+++ b/net/netrom/nr_dev.c
@@ -56,7 +56,7 @@
 
 	/* Spoof incoming device */
 	skb->dev      = dev;
-	skb_reset_mac_header(skb);
+	skb->mac_header = skb->network_header;
 	skb_reset_network_header(skb);
 	skb->pkt_type = PACKET_HOST;