CVE-2022-48783 net: dsa: lantiq_gswip: fix use after free in gswip_remove()

In the Linux kernel, the following vulnerability has been resolved: net: dsa: lantiqgswip: fix use after free in gswipremove ofnodeputpriv-ds-slavemiibus-dev.ofnode should be done before mdiobusfreepriv-ds-slavemiibus...