rxrpc: The offset field in struct rxrpc_skb_priv is unnecessary

The offset field in struct rxrpc_skb_priv is unnecessary as the value can
always be calculated.

Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/local_event.c b/net/rxrpc/local_event.c
index 190f68b..540d395 100644
--- a/net/rxrpc/local_event.c
+++ b/net/rxrpc/local_event.c
@@ -95,7 +95,8 @@
 
 		switch (sp->hdr.type) {
 		case RXRPC_PACKET_TYPE_VERSION:
-			if (skb_copy_bits(skb, sp->offset, &v, 1) < 0)
+			if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
+					  &v, 1) < 0)
 				return;
 			_proto("Rx VERSION { %02x }", v);
 			if (v == 0)