Now ARMv6 and ARMv7 builds avoid installing DTBs for boards where the
resulting kernel won't run just like the aarch64 builds already do.
Also deduplicates the logic a bit.
Also remove the upstream device trees beforehand so we don't
accidentally end using them if we mess up in postFixup.
Also on the topic of mess ups, make the copy unconditional since they
always seem to be built on all architectures anyway so checking for
their existence just hides typos.
In particular, now the mainline kernel can be built on the RPi 1 as well
(so kernelBaseConfig should always be a mainline defconfig from now on).
And RPi 2 users can now use linux_rpi without doing the
`nixpkgs.config.platform = lib.systems.platforms.raspberrypi2;` dance.
- defined buildLinux as generic.nix instead of manual-config.nix. This
makes kernel derivations a tad more similar to your typical derivations.
- moved $buildRoot to within the source folder, this way it doesn't have to be created before the unpackPhase
and make it easier to work on kernel source without running the unpackPhase
Copied from linux_4_4 (except for the EFI stub thing).
Otherwise the firewall module fails to evaluate:
Failed assertions:
- This kernel does not support rpfilter
- Add a patch to unset CONFIG_LOCALVERSION in the v7 build.
- Copy all the device trees to match the upstream names so U-Boot can
find them. (This is a hack.)
