tests/functional: Require TCG to run Aarch64 imx8mp-evk test

The imx8mp-evk machine can only run with the TCG accelerator.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20250623121845.7214-25-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

tests/functional/test_aarch64_imx8mp_evk.py

@@ -49,6 +49,7 @@ class Imx8mpEvkMachine(LinuxKernelTest):
                      self.DTB_OFFSET, self.DTB_SIZE)
 
     def test_aarch64_imx8mp_evk_usdhc(self):
+        self.require_accelerator("tcg")
         self.set_machine('imx8mp-evk')
         self.vm.set_console(console_index=1)
         self.vm.add_args('-m', '2G',