Draft: Add generic arm64 image
Those changes allow building an image able to boot on several arm64 devices, as long as a boot firmware, such as Tow-Boot for the PinePhone (Pro), is already installed on the device.
It relies on our generic kernel and mobian-tweaks-data + tweakster for configuring the system at boot time based on the exact device being used.
The new firmware-mobian-nonfree package is also used in this recipe, as it contains all binary firmware needed for devices we support (camera AF + wifi/BT firmware for the OG PP, wifi/BT config blog for the PPP) and depends on relevant Debian non-free packages.
!!! IMPORTANT !!!
Please note mobian-tweaks-data
is a temporary package for testing
purposes only! It isn't meant to be carried as part of Mobian, but
should instead replace Debian's mobile-tweaks
package.