[RFC PATCH 0/9] Update lzma to current version of LZMA SDK

[Tom Rini]

Hey all,

A long while ago, Darek reported that our copy of the LZMA SDK library
is quite old and so vulnerable to at least one possible security issue
he found that was fixed upstream.

This RFC series does a few things. First, we introduce a Kconfig option
to enable LZMA's size reduction option, and enable it on
gardena-smart-gateway-mt7688. This is not critical at the start, but is
as we move forward. Next, we remove some files from our initial import
of the library that do not make sense to keep in-tree. After that, the
next 5 patches update us from the imported version to the current
release of 25.01. This is split up such that few have the very few
places where the update requires some slight changes to our code be more
visible. This in turn is mainly that the file that says the license has
changed, and that we need to guard around some unused upstream code that
also conflicts with our own code. Finally, we restore the spacing
changes that our copy of the code had, and then improve things by adding
SPDX tags to the LZMA code so the license is more visible overall.

I've marked this as RFC in part because I plan to follow-up with v1
shortly where patches 2 through 8 are squashed together as they're
mainly separate right now for ease of review, but the split doesn't make
sense I believe to preserve in git as our changes are so isolated.

Link: https://lore.kernel.org/u-boot/CAC7rXdTb5u5pzP-mr_+pddCxzfcO8Vm_t-=_+5wxRitMjy6-JA@mail.gmail.com/
-- 
Tom