community/linux-postmarketos-rockchip: Migrate to kernel 6.2 and add wifi support
The Acer Chrometab 10 device runs with the google-dru device package, and utilises the linux-postmarketos-rockchip kernel. This configuration currently leaves the device without functioning wifi.
Bring in wifi support, first migrating to the latest 6.2 kernel and then enabling the ATH10K kernel module.
Tested on an Acer Chromebook Tab 10 with SKU-ID 6.