Merge tag 'pull-request-2023-05-22' of https://gitlab.com/thuth/qemu into staging

* First batch of fixes to allow "make check" with "--without-default-devices"
* Enable the "bios bits" avocado test in the gitlab-CI
* Another minor fix for the redundancy DMA blocker code

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* tag 'pull-request-2023-05-22' of https://gitlab.com/thuth/qemu

:
  memory: stricter checks prior to unsetting engaged_in_io
  acpi/tests/avocado/bits: enable bios bits avocado tests on gitlab CI pipeline
  .gitlab-ci.d/buildtest.yml: Run full "make check" with --without-default-devices
  tests/qemu-iotests/172: Run QEMU with -vga none and -nic none
  tests/qtest/meson.build: Run the net filter tests only with default devices
  tests/qtest: Check for the availability of virtio-ccw devices before using them
  tests/qtest/virtio-ccw-test: Remove superfluous tests
  tests/qtest/cdrom-test: Fix the test to also work without optional devices
  tests/qtest/usb-hcd-uhci-test: Skip test if UHCI controller is not available
  tests/qtest/readconfig-test: Check for the availability of USB controllers
  hw/sparc64/sun4u: Use MachineClass->default_nic and MachineClass->no_parallel
  hw/i386: Ignore the default parallel port if it has not been compiled into QEMU
  hw/char/parallel: Move TYPE_ISA_PARALLEL to the header file
  hw/sh4: Use MachineClass->default_nic in the sh4 r2d machine
  hw/s390x: Use MachineClass->default_nic in the s390x machine
  hw/ppc: Use MachineClass->default_nic in the ppc machines
  softmmu/vl.c: Disable default NIC if it has not been compiled into the binary
  hw: Move the default NIC machine class setting from the x86 to the generic one
  softmmu/vl.c: Check for the availability of the VGA device before using it
  hw/i386/Kconfig: ISAPC works fine without VGA_ISA

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>