net: dsa: Pass a port to get_tag_protocol()

A number of drivers want to check whether the configured CPU port is a
possible configuration for enabling tagging, pass down the CPU port
number so they verify that.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c
index 3a3f4f7..bb71d3d 100644
--- a/drivers/net/dsa/dsa_loop.c
+++ b/drivers/net/dsa/dsa_loop.c
@@ -64,7 +64,8 @@ struct dsa_loop_priv {
 
 static struct phy_device *phydevs[PHY_MAX_ADDR];
 
-static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds)
+static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
+						   int port)
 {
 	dev_dbg(ds->dev, "%s\n", __func__);