hw/isa/superio: Fix inconsistent use of Chardev->be

4c3119a6e3e and cd9526ab7c0 introduced an incorrect and inconsistent
use of Chardev->be. Also, this CharBackend member is private and is
not supposed to be accessible.

Fix it by removing the inconsistent check.

Cc: qemu-stable@nongnu.org
Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180515152500.19460-2-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

hw/isa/isa-superio.c

@@ -42,7 +42,7 @@ static void isa_superio_realize(DeviceState *dev, Error **errp)
         if (!k->parallel.is_enabled || k->parallel.is_enabled(sio, i)) {
             /* FIXME use a qdev chardev prop instead of parallel_hds[] */
             chr = parallel_hds[i];
-            if (chr == NULL || chr->be) {
+            if (chr == NULL) {
                 name = g_strdup_printf("discarding-parallel%d", i);
                 chr = qemu_chr_new(name, "null");
             } else {
@@ -82,7 +82,7 @@ static void isa_superio_realize(DeviceState *dev, Error **errp)
         if (!k->serial.is_enabled || k->serial.is_enabled(sio, i)) {
             /* FIXME use a qdev chardev prop instead of serial_hd() */
             chr = serial_hd(i);
-            if (chr == NULL || chr->be) {
+            if (chr == NULL) {
                 name = g_strdup_printf("discarding-serial%d", i);
                 chr = qemu_chr_new(name, "null");
             } else {