dsa: Add MODULE_LICENSE to tag drivers

All the tag drivers are some variant of GPL. Add a MODULE_LICENSE()
indicating this, so the drivers can later be compiled as modules.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
index 24d8f45..59421f9 100644
--- a/net/dsa/tag_brcm.c
+++ b/net/dsa/tag_brcm.c
@@ -201,4 +201,5 @@ const struct dsa_device_ops brcm_prepend_netdev_ops = {
 };
 #endif
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM_PREPEND);
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c
index 8aefaf9..b8f3236 100644
--- a/net/dsa/tag_dsa.c
+++ b/net/dsa/tag_dsa.c
@@ -158,4 +158,5 @@ const struct dsa_device_ops dsa_netdev_ops = {
 	.overhead = DSA_HLEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_DSA);
diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c
index bad12e7..c4fddf7 100644
--- a/net/dsa/tag_edsa.c
+++ b/net/dsa/tag_edsa.c
@@ -177,4 +177,5 @@ const struct dsa_device_ops edsa_netdev_ops = {
 	.overhead = EDSA_HLEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_EDSA);
diff --git a/net/dsa/tag_gswip.c b/net/dsa/tag_gswip.c
index 30bf703..6a7ff06 100644
--- a/net/dsa/tag_gswip.c
+++ b/net/dsa/tag_gswip.c
@@ -110,4 +110,5 @@ const struct dsa_device_ops gswip_netdev_ops = {
 	.overhead = GSWIP_RX_HEADER_LEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_GSWIP);
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index 9be0f5f..6d78d88 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -176,4 +176,5 @@ const struct dsa_device_ops ksz9893_netdev_ops = {
 	.overhead = KSZ_INGRESS_TAG_LEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9893);
diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c
index 48bca20..1f5819e 100644
--- a/net/dsa/tag_lan9303.c
+++ b/net/dsa/tag_lan9303.c
@@ -135,4 +135,5 @@ const struct dsa_device_ops lan9303_netdev_ops = {
 	.overhead = LAN9303_TAG_LEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_LAN9303);
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index 23210a6..7ecafb5 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -106,4 +106,5 @@ const struct dsa_device_ops mtk_netdev_ops = {
 	.overhead	= MTK_HDR_LEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_MTK);
diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
index 7d9cb17..f3fdeaf 100644
--- a/net/dsa/tag_qca.c
+++ b/net/dsa/tag_qca.c
@@ -107,4 +107,5 @@ const struct dsa_device_ops qca_netdev_ops = {
 	.overhead = QCA_HDR_LEN,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_QCA);
diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c
index 00d521c..9ec6aa7 100644
--- a/net/dsa/tag_trailer.c
+++ b/net/dsa/tag_trailer.c
@@ -84,4 +84,5 @@ const struct dsa_device_ops trailer_netdev_ops = {
 	.overhead = 4,
 };
 
+MODULE_LICENSE("GPL");
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_TRAILER);