Merge tag 'm68k-pull-2023-12-22' of https://gitlab.com/huth/qemu into staging

* Add dummy next-cube ethernet register to allow diagnostic to timeout
* Don't pulse next-cube SCSI DMA IRQ upon reception of FLUSH command
* Rework next-cube mmio ops and system control register handling functions
* Embed next-cube MemoryRegions into NeXTState

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# gpg: Signature made Fri 22 Dec 2023 08:40:06 EST
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "huth@tuxfamily.org"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* tag 'm68k-pull-2023-12-22' of https://gitlab.com/huth/qemu:
  next-cube.c: move machine MemoryRegions into NeXTState
  next-cube.c: remove val and size arguments from nextscr2_write()
  next-cube.c: move LED logic to new next_scr2_led_update() function
  next-cube.c: move static old_scr2 variable to NeXTPC
  next-cube.c: move static phase variable to NextRtc
  next-cube.c: move static led variable to NeXTPC
  next-cube.c: update and improve dma_ops
  next-cube.c: update scr_ops to properly use modern memory API
  next-cube.c: update mmio_ops to properly use modern memory API
  next-cube.c: don't pulse SCSI DMA IRQ upon reception of FLUSH command
  next-cube.c: add dummy Ethernet register to allow diagnostic to timeout

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