Merge tag 'spdx-check-pull-request' of https://gitlab.com/berrange/qemu into staging

Merge tag 'spdx-check-pull-request' of https://gitlab.com/berrange/qemu into staging

SPDX support for checkpatch

* Mandate use of SPDX-License-Identifier in new files
* Validate SPDX license choices
* Forbid other SPDX tags

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# gpg: Signature made Fri 28 Feb 2025 23:43:50 HKT
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* tag 'spdx-check-pull-request' of https://gitlab.com/berrange/qemu:
  scripts: forbid use of arbitrary SPDX tags besides license identifiers
  scripts: validate SPDX license choices
  scripts: mandate that new files have SPDX-License-Identifier

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>