Log message:
u-boot & u-boot-pinecube: fix pinecube builds

As of py-setuptools 69.0, PEP 440 versioning is strictly enforced, so
builds that invoked pylibfdt were failing with a version string that
included "u-boot-" in it.

Log message:
u-boot: fix pine-h64 builds

As of py-setuptools 69.0, PEP 440 versioning is strictly enforced, so
builds that invoked pylibfdt were failing with a version string that
included "u-boot-" in it.

Log message:
u-boot: fix nanopi-r2s and rock64 builds

As of py-setuptools 69.0, PEP 440 versioning is strictly enforced, so
builds that invoked pylibfdt were failing with a version string that
included "u-boot-" in it.

Log message:
u-boot-nanopi-r2s: add new package

This has been tested by myself and found to work seemingly stably,
including the RTL8153 USB-based Ethernet port (which was reported to
have issues on port-arm@ back in 2022).

This package is not based on the one in wip, as it was very out of date
and was reported to support less of the hardware correctly. Instead,
the more current framework for Rockchip boards in pkgsrc is used.

Log message:
u-boot-rockchip.mk: tweak some comments

Update a comment, and fix spelling and grammar while here.

Log message:
u-boot-rockchip.mk: contextualize the image name

Not strictly necessary, but for consistency. (Another package will
shortly be added where this context becomes relevant.)

Log message:
u-boot-rockchip.mk: cut comment, u-boot-rockpro64-ayufan is gone

Log message:
*: recursive bump for Python 3.11 as new default