net: mdio: fill in missing MODULE_DESCRIPTION()s

W=1 builds now warn if a module is built without a
MODULE_DESCRIPTION(). Fill them in based on the Kconfig text, or
similar.

Signed-off-by: Andrew Lunn <[e-mail]>
Reviewed-by: Florian Fainelli <[e-mail]>
Acked-by: Andrew Jeffery <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/mdio/acpi_mdio.c

···
 
 MODULE_AUTHOR("Calvin Johnson <[e-mail]>");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ACPI MDIO bus (Ethernet PHY) accessors");
 
 /**
  * __acpi_mdiobus_register - Register mii_bus and create PHYs from the ACPI ASL.

drivers/net/mdio/fwnode_mdio.c

···
 
 MODULE_AUTHOR("Calvin Johnson <[e-mail]>");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("FWNODE MDIO bus (Ethernet PHY) accessors");
 
 static struct pse_control *
 fwnode_find_pse_control(struct fwnode_handle *fwnode)

drivers/net/mdio/mdio-aspeed.c

···
 
 MODULE_AUTHOR("Andrew Jeffery <[e-mail]>");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ASPEED MDIO bus controller");

drivers/net/mdio/mdio-bitbang.c

···
 EXPORT_SYMBOL(free_mdio_bitbang);
 
 MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Bitbanged MDIO buses");

drivers/net/mdio/of_mdio.c

···
 
 MODULE_AUTHOR("Grant Likely <[e-mail]>");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("OpenFirmware MDIO bus (Ethernet PHY) accessors");
 
 /* Extract the clause 22 phy ID from the compatible string of the form
  * ethernet-phy-idAAAA.BBBB */