net: fec_mpc52xx_phy: Add missing MODULE_DESCRIPTION()

Fixes error during modpost:

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/net/ethernet/freescale/fec_mpc52xx_phy.o

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260527025139.10188-1-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: neheb

drivers/net/ethernet/freescale/fec_mpc52xx_phy.c

@@ -150,4 +150,5 @@ struct platform_driver mpc52xx_fec_mdio_driver = {
 /* let fec driver call it, since this has to be registered before it */
 EXPORT_SYMBOL_GPL(mpc52xx_fec_mdio_driver);
 
+MODULE_DESCRIPTION("MPC52xx FEC MDIO bus driver");
 MODULE_LICENSE("Dual BSD/GPL");