hw/rx: Honor -accel qtest

Issue an error if no kernel, no bios, and not qtest'ing.
Fixes make check-qtest-rx: test/qom-test.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20190531134315.4109-16-richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/rx/rx62n.c

@@ -21,12 +21,14 @@
 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
+#include "qemu/error-report.h"
 #include "hw/hw.h"
 #include "hw/rx/rx62n.h"
 #include "hw/loader.h"
 #include "hw/sysbus.h"
 #include "hw/qdev-properties.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/qtest.h"
 #include "cpu.h"
 
 /*
@@ -208,7 +210,12 @@ static void rx62n_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(s->sysmem, RX62N_CFLASH_BASE, &s->c_flash);
 
     if (!s->kernel) {
-        rom_add_file_fixed(bios_name, RX62N_CFLASH_BASE, 0);
+        if (bios_name) {
+            rom_add_file_fixed(bios_name, RX62N_CFLASH_BASE, 0);
+        }  else if (!qtest_enabled()) {
+            error_report("No bios or kernel specified");
+            exit(1);
+        }
     }
 
     /* Initialize CPU */