net: dsa: make dsa_pack_type static

net/dsa/dsa.c:624:20: sparse: symbol 'dsa_pack_type' was not declared.
Should it be static?

Fixes: 3e8a72d1dae374 ("net: dsa: reduce number of protocol hooks")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/dsa.c

@@ -629,7 +629,7 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 	return dst->ops->rcv(skb, dev, pt, orig_dev);
 }
 
-struct packet_type dsa_pack_type __read_mostly = {
+static struct packet_type dsa_pack_type __read_mostly = {
 	.type	= cpu_to_be16(ETH_P_XDSA),
 	.func	= dsa_switch_rcv,
 };