tests/functional: Convert nanomips Malta avocado tests

tests/functional: Convert nanomips Malta avocado tests

Straight forward conversion. Update the SHA1 hashes to
SHA256 hashes since SHA1 should not be used anymore nowadays.

  $ QEMU_TEST_ALLOW_UNTRUSTED_CODE=1 \
        make check-functional-mipsel
  ...
  ▶ 4/4 test_mipsel_malta.MaltaMachineConsole.test_mips_malta32el_nanomips_16k_up   OK
  ▶ 4/4 test_mipsel_malta.MaltaMachineConsole.test_mips_malta32el_nanomips_4k       OK
  ▶ 4/4 test_mipsel_malta.MaltaMachineConsole.test_mips_malta32el_nanomips_64k_dbg  OK
  ▶ 4/4 test_mipsel_malta.MaltaMachineYAMON.test_mipsel_malta_yamon                 OK
  4/4 qemu:func-thorough+func-mipsel-thorough+thorough / func-mipsel-mipsel_malta   OK   9.95s   4 subtests passed

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240827094905.80648-7-philmd@linaro.org>
[thuth: Use LinuxKernelTest]
Message-ID: <20240906180549.792832-8-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>