tests/functional: Convert the r2d sh4 Avocado test

This is the last test that is using the do_test_advcal_2018()
function, so we can now remove that function from boot_linux_console.py,
too.

Message-ID: <20240919185749.71222-8-thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional/test_sh4_r2d.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+#
+# Boot a Linux kernel on a r2d sh4 machine and check the console
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import os
+
+from qemu_test import LinuxKernelTest, Asset
+from qemu_test.utils import archive_extract
+from unittest import skipUnless
+
+class R2dTest(LinuxKernelTest):
+
+    ASSET_DAY09 = Asset(
+        'https://www.qemu-advent-calendar.org/2018/download/day09.tar.xz',
+        'a61b44d2630a739d1380cc4ff4b80981d47ccfd5992f1484ccf48322c35f09ac')
+
+    # This test has a 6-10% failure rate on various hosts that look
+    # like issues with a buggy kernel.
+    @skipUnless(os.getenv('QEMU_TEST_FLAKY_TESTS'), 'Test is unstable')
+    def test_r2d(self):
+        self.set_machine('r2d')
+        file_path = self.ASSET_DAY09.fetch()
+        archive_extract(file_path, self.workdir)
+        self.vm.add_args('-append', 'console=ttySC1')
+        self.launch_kernel(self.workdir + '/day09/zImage', console_index=1,
+                           wait_for='QEMU advent calendar')
+
+if __name__ == '__main__':
+    LinuxKernelTest.main()