net: dsa: bcm_sf2: Utilize b53_get_tag_protocol()

Utilize the much more capable b53_get_tag_protocol() which takes care of
all Broadcom switches specifics to resolve which port can have Broadcom
tags enabled or not.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index f5a8dd9..7f26f5d 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1495,8 +1495,7 @@ static bool b53_can_enable_brcm_tags(struct dsa_switch *ds, int port)
 	return false;
 }
 
-static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds,
-						  int port)
+enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds, int port)
 {
 	struct b53_device *dev = ds->priv;
 
@@ -1514,6 +1513,7 @@ static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds,
 
 	return DSA_TAG_PROTO_BRCM;
 }
+EXPORT_SYMBOL(b53_get_tag_protocol);
 
 int b53_mirror_add(struct dsa_switch *ds, int port,
 		   struct dsa_mall_mirror_tc_entry *mirror, bool ingress)