Merge tag 'zstd-linus-v6.15-rc1' of https://github.com/terrelln/linux

Merge tag 'zstd-linus-v6.15-rc1' of https://github.com/terrelln/linux

Pull zstd updates from Nick Terrell:
 "Update zstd to the latest upstream release v1.5.7.

  The two major motivations for updating Zstandard are to keep the code
  up to date, and to expose API's needed by Intel for the QAT
  compression accelerator.

  Imported cleanly from the upstream tag v1.5.7-kernel, which is signed
  by upstream's signing key EF8FE99528B52FFD"

Link: https://github.com/facebook/zstd/releases/tag/v1.5.7
Link: https://github.com/facebook/zstd/releases/tag/v1.5.7-kernel
Link: https://keyserver.ubuntu.com/pks/lookup?search=EF8FE99528B52FFD&fingerprint=on&op=index
* tag 'zstd-linus-v6.15-rc1' of https://github.com/terrelln/linux:
  zstd: Import upstream v1.5.7