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>

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);

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);

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);

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);

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);

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);

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);

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);

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);