In mainline Linux these paths will be used, move the firmware packaging
there. By doing this we drop downstream support. Support could be
restored by adding some symlinks in a downstream-specific package if
required.
We also start squashing the firmware into .mbn format with pil-squasher.
For now we keep the files in _wififiles in their old location, I'm not
sure yet where they need to go since I didn't have wcnss working on
mainline yet.
Add pmb:cross-native/!tracedeps to applicable firmware packages and
secure both with a test.
This sets the pmb:cross-native and !tracedeps options on all firmware-*
packages that are compatible with the native compilation method. A unit
test ensures the presence of both options while maintaining a list of
exempted packages.
Fixes: #718
[ci:ignore-count] [ci:skip-vercheck] [ci:skip-build]
