CVE-2022-48817 net: dsa: ar9331: register the mdiobus under devres

In the Linux kernel, the following vulnerability has been resolved: net: dsa: ar9331: register the mdiobus under devres As explained in commits: 74b6d7d13307 "net: dsa: realtek: register the MDIO bus under devres" 5135e96a3dd2 "net: dsa: don't allocate the slavemiibus using devres" mdiobusfree wi...