New upstream release:
Changes since v1.6.0 include:
* A number of bugfixes
* Fix many warnings with -Wsign-compare
* Add compilation with meson (not used by default so far)
* Yet another revamp of how we handle unaligned accesses
* Added a number of extra checks for common tree errors
* Checks for interrupt providers
* i2c reg properties
* Tighten checking of gpio properties
* Reduce dependencies when building libfdt only
* Allow libfdt.h header to be used from C++ more easily
* Accept .dtbo extension for overlays
* Update valid node and property characters to match current devicetree spec
* Add several checks for root node sanity in fdt_check_full()
* Somewhat more robust type labelling for the benefit of yaml output
continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
