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

Migration and mem pull request

- Fabiano's fix on migrate_set_parameter crash with multifd & zerocopy
- Pranav's fix on postcopy stucking at device state when ack lost
- Samuel's new migration parameter x-rdma-chunk-size for RDMA
- PeterX's vfio/migration series to report remaining data and fix downtime calc
- PeterM's MemoryRegionOps .impl cleanup series
- Fabiano's fix to build a-b migration bootfiles for all archs

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* tag 'next-pull-request' of https://gitlab.com/peterx/qemu: (23 commits)
  tests/qtest/migration: Fix A-B file build
  system/memory: assert on invalid MemoryRegionOps .unaligned combo
  hw/xtensa/mx_pic: Specify xtensa_mx_pic_ops .impl settings
  hw/npcm7xx_fiu: Specify .impl for npcm7xx_fiu_flash_ops
  hw/riscv: iommu-trap: remove .impl.unaligned = true
  vfio/migration: Add tracepoints for precopy/stopcopy query ioctls
  migration/qapi: Update unit for avail-switchover-bandwidth
  migration/qapi: Introduce system-wide "remaining" reports
  migration: Remember total dirty bytes in mig_stats
  migration: Fix calculation of expected_downtime to take VFIO info
  migration: Calculate expected downtime on demand
  migration: Introduce a helper to return switchover bw estimate
  migration: Move iteration counter out of RAM
  vfio/migration: Fix incorrect reporting for VFIO pending data
  migration: Introduce stopcopy_bytes in save_query_pending()
  migration: Use the new save_query_pending() API directly
  migration/treewide: Merge @state_pending_{exact|estimate} APIs
  vfio/migration: Cache stop size in VFIOMigration
  migration/qapi: Rename MigrationStats to MigrationRAMStats
  migration: Fix low possibility downtime violation
  ...

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