Introduce a linux-next kernel with postmarketOS configs and some
additional device specific configs enabled.
This kernel package will be updated daily to the latest -next tag.
breakages expected. It is designed to be used in tandem with a generic
ARM64 device package to provide a bleeding edge option for those with
EFI capable bootloaders.
Signed-off-by: Caleb Connolly <caleb@postmarketos.org>