tests fail in staging-7.2 after "fix direction of "32-bit MMU" patch
Description of problem:
Running the tests with current staging-7.2 sources after compiling, it results in failing some tests after introduction of the following patches:

- [target/i386: introduce function to query MMU indices](https://gitlab.com/qemu-project/qemu/-/commit/6332f3c12f7fc6c01fae1eaa59d661fef280f499)

- [target/i386: use separate MMU indexes for 32-bit accesses](https://gitlab.com/qemu-project/qemu/-/commit/6b9875b03c81351c5f0268f571e011cf5f2fd9d2)

- [target/i386: fix direction of "32-bit MMU" test](https://gitlab.com/qemu-project/qemu/-/commit/64e5fffe523daee23b06f3fd0f31721b137901b5)

- [target/i386: Revert monitor_puts() in do_inject_x86_mce()](https://gitlab.com/qemu-project/qemu/-/commit/1d024cdc49a9ebc4d51142d2c33668bba1d31c89)

in particular is the fix:

- [target/i386: fix direction of "32-bit MMU" test](https://gitlab.com/qemu-project/qemu/-/commit/64e5fffe523daee23b06f3fd0f31721b137901b5)

that causes the tests failing (removing such fix, tests passes). The failing tests are:

```
Summary of Failures:

 92/689 qemu:qtest+qtest-i386 / qtest-i386/boot-serial-test                       ERROR           0.10s   killed by signal 6 SIGABRT
127/689 qemu:qtest+qtest-x86_64 / qtest-x86_64/boot-serial-test                   ERROR           0.12s   killed by signal 6 SIGABRT
 48/689 qemu:qtest+qtest-i386 / qtest-i386/bios-tables-test                       ERROR          40.95s   killed by signal 6 SIGABRT
 71/689 qemu:qtest+qtest-x86_64 / qtest-x86_64/bios-tables-test                   ERROR          40.45s   killed by signal 6 SIGABRT
```

In particular we have:

```
 92/689 qemu:qtest+qtest-i386 / qtest-i386/boot-serial-test                       ERROR           0.10s   killed by signal 6 SIGABRT
――――――――――――――――――――――――――――――――――――― ✀  ―――――――――――――――――――――――――――――――――――――
stderr:
Broken pipe
../tests/qtest/libqtest.c:188: kill_qemu() detected QEMU death from signal 11 (Segmentation fault) (core dumped)

(test program exited with status code -6)
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
```

and


```
127/689 qemu:qtest+qtest-x86_64 / qtest-x86_64/boot-serial-test                   ERROR           0.12s   killed by signal 6 SIGABRT
――――――――――――――――――――――――――――――――――――― ✀  ―――――――――――――――――――――――――――――――――――――
stderr:
Broken pipe
../tests/qtest/libqtest.c:188: kill_qemu() detected QEMU death from signal 11 (Segmentation fault) (core dumped)

(test program exited with status code -6)

TAP parsing error: Too few tests run (expected 2, got 0)
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
```

and so on.