docs/system: Fix the information on how to run certain functional tests

The tests have been converted to the functional framework, so
we should not talk about Avocado here anymore.

Fixes: f7d6b77220 ("tests/functional: Convert BananaPi tests to the functional framework")
Fixes: 380f7268b7 ("tests/functional: Convert the OrangePi tests to the functional framework")
Fixes: 4c0a2df81c ("tests/functional: Convert some tests that download files via fetch_asset()")
Message-ID: <20250311160847.388670-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/system/arm/bananapi_m2u.rst

@@ -135,6 +135,5 @@ provide the following command:
 .. code-block:: bash
 
   $ cd qemu-build-dir
-  $ AVOCADO_ALLOW_LARGE_STORAGE=yes tests/venv/bin/avocado \
-    --verbose --show=app,console run -t machine:bpim2u \
-    ../tests/avocado/boot_linux_console.py
+  $ QEMU_TEST_ALLOW_LARGE_STORAGE=1 \
+    meson test --suite thorough func-arm-arm_bpim2u

docs/system/arm/orangepi.rst

@@ -257,9 +257,9 @@ Orange Pi PC integration tests
 
 The Orange Pi PC machine has several integration tests included.
 To run the whole set of tests, build QEMU from source and simply
-provide the following command:
+provide the following command from the build directory:
 
 .. code-block:: bash
 
-  $ AVOCADO_ALLOW_LARGE_STORAGE=yes avocado --show=app,console run \
-     -t machine:orangepi-pc tests/avocado/boot_linux_console.py
+  $ QEMU_TEST_ALLOW_LARGE_STORAGE=1 \
+    meson test --suite thorough func-arm-arm_orangepi

docs/system/devices/igb.rst

@@ -57,11 +57,11 @@ directory:
   meson test qtest-x86_64/qos-test
 
 ethtool can test register accesses, interrupts, etc. It is automated as an
-Avocado test and can be ran with the following command:
+functional test and can be ran with the following command:
 
 .. code:: shell
 
-  make check-avocado AVOCADO_TESTS=tests/avocado/netdev-ethtool.py
+  meson test --suite thorough func-x86_64-netdev_ethtool
 
 References
 ==========