net: phy: cortina: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE

This change resolves a new compile-time warning
when built as a loadable module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/net/phy/cortina.o
see include/linux/module.h for more information

This adds the license as "GPL", which matches the header of the file.

MODULE_DESCRIPTION and MODULE_AUTHOR are also added.

Signed-off-by: Jesse Chan <jc@linux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/cortina.c b/drivers/net/phy/cortina.c
index 72f4228..9442db2 100644
--- a/drivers/net/phy/cortina.c
+++ b/drivers/net/phy/cortina.c
@@ -116,3 +116,7 @@
 };
 
 MODULE_DEVICE_TABLE(mdio, cortina_tbl);
+
+MODULE_DESCRIPTION("Cortina EDC CDR 10G Ethernet PHY driver");
+MODULE_AUTHOR("NXP");
+MODULE_LICENSE("GPL");