Lots of device-specific configurations:
* android mount points and mounts
* android groups and users (needed for udev rules)
* android udev rules for platform devices (needed for android services to run)
* NetworkManager device-specific config
* wpa_supplicant device-specific config
* device-specific openrc service for late initcalls to bring up Wi-Fi hardware
* extra helper scripts to call logcat, set backlight brightness,
get battery status, unlock kde screenlocker session
* use kernel cmdline from downstream android to keep it as close to
android as possible. Important for android in lxc container later
We don't need to append the dtb to the kernel image in all cases, with
e.g. the u-boot bootloader we can load the dtb seperately from the
kernel image. Introduce a new variable deviceinfo_append_dtb, if set to
"true", append the dtb, otherwise just copy the dtb file to the boot
partition.
Fixes#260
[ci:ignore-count]
The `msm-fb-refresher` updates the screen for msm based devices. It is
not needed for all devices, so we had some extra code in the initramfs,
that would only add it when the `deviceinfo_msm_refresher` variable was
set. However, we are able now to add files to initramfs hooks, so this
hack can be removed and simplify everything.
Changes:
* Remove `deviceinfo_msm_refresher` from all deviceinfos
* Add sanity check for it
* Move all `deviceinfo` sanity checks to an extra function
* `postmarketos-mkinitfs`: remove code for msm refresher
* `msm-fb-refresher`: add initramfs hook
