Linux 6.7-rc1 looks for the venus (video) firmware in
qcom/venus-1.8/venus.mbn instead of qcom/venus-1.8/venus.mdt.
Let's install it in both places with a symlink so that the firmware
packages work for both older and newer Linux versions.
[ci:ignore-count]: lots of packages
[ci:skip-build] already built successfully in CI
While the newer "Linux board support package" has newer versions for
the "modem" and "venus" firmware, the "wcnss" firmware is actually
older than the one in the previous 1034.2.1 release. To avoid
downgrading it, it is still packaged from the old release in a separate
APKBUILD. (It is probably also better tested than the new release...)
[ci:skip-vercheck]: non-zero pkgrel is intended to match old package
[ci:skip-build] already built successfully in CI
