Merge tag 'migration-20230316-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request

Hi

This is just fixes for migration.
- Fix rdma (dave)
- Remove unused variable (Zhijian)
- Fix AVX512 and XBZRLE (Matheus)
- Fix migration preempt (Peter)
- Fix populate_vfio_info (Steve)
- Fix multifd send trace (Wei)

Please apply.

Later, Juan.

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# gpg: Signature made Thu 16 Mar 2023 15:11:41 GMT
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20230316-pull-request' of https://gitlab.com/juan.quintela/qemu

:
  migration: fix populate_vfio_info
  migration/multifd: correct multifd_send_thread to trace the flags
  migration/rdma: Remove deprecated variable rdma_return_path
  migration/xbzrle: fix out-of-bounds write with axv512
  migration/xbzrle: use ctz64 to avoid undefined result
  migration/rdma: Fix return-path case
  migration: Wait on preempt channel in preempt thread

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>