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

Migration / Memory pull

- Yanfei's optimization to skip log_clear during completion
- Fabiano's cleanup to remove leftover migration-helpers.c file
- Juraj's vnc fix on display pause after migration
- Jaehoon's cpr test fix on possible race of server establishment
- Chenyi's initial support on vfio enablement for guest-memfd

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* tag 'migration-staging-pull-request' of https://gitlab.com/peterx/qemu:
  physmem: Support coordinated discarding of RAM with guest_memfd
  ram-block-attributes: Introduce RamBlockAttributes to manage RAMBlock with guest_memfd
  memory: Unify the definiton of ReplayRamPopulate() and ReplayRamDiscard()
  memory: Change memory_region_set_ram_discard_manager() to return the result
  memory: Export a helper to get intersection of a MemoryRegionSection with a given range
  migration: Don't sync volatile memory after migration completes
  tests/migration: Setup pre-listened cpr.sock to remove race-condition.
  migration: Support fd-based socket address in cpr_transfer_input
  ui/vnc: Update display update interval when VM state changes to RUNNING
  tests/qtest: Remove migration-helpers.c
  migration/ram: avoid to do log clear in the last round

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