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 <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Acked-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20231028184458.99448-3-andrew@lunn.chSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/mdio/acpi_mdio.c

@@ -16,6 +16,7 @@
 
 MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
 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

@@ -14,6 +14,7 @@
 
 MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
 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

@@ -205,3 +205,4 @@ module_platform_driver(aspeed_mdio_driver);
 
 MODULE_AUTHOR("Andrew Jeffery <andrew@aj.id.au>");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ASPEED MDIO bus controller");

drivers/net/mdio/mdio-bitbang.c

@@ -263,3 +263,4 @@ void free_mdio_bitbang(struct mii_bus *bus)
 EXPORT_SYMBOL(free_mdio_bitbang);
 
 MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Bitbanged MDIO buses");

drivers/net/mdio/of_mdio.c

@@ -25,6 +25,7 @@
 
 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
 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 */