tests/qtest: Do not run lsi53c895a test if device is not present

The tests are built once for all the targets, so as long as one QEMU
binary is built with CONFIG_LSI_SCSI_PCI=y, this test will
run. However some binaries might not include the device. So check this
again in runtime.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Message-Id: <20230208194700.11035-3-farosas@suse.de>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/fuzz-lsi53c895a-test.c

@@ -112,6 +112,10 @@ static void test_lsi_do_dma_empty_queue(void)
 
 int main(int argc, char **argv)
 {
+    if (!qtest_has_device("lsi53c895a")) {
+        return 0;
+    }
+
     g_test_init(&argc, &argv, NULL);
 
     qtest_add_func("fuzz/lsi53c895a/lsi_do_dma_empty_queue",