vt82c686: Set user_creatable=false for VT82C686B_PM

This device is part of the multifunction VIA superio/south bridge chip
so not useful in itself.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <d0a806fed5e8055aee4fcf5b2f4790e6dd0f9dc6.1610223397.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/isa/vt82c686.c

@@ -200,8 +200,9 @@ static void via_pm_class_init(ObjectClass *klass, void *data)
     k->revision = 0x40;
     dc->reset = vt82c686b_pm_reset;
     dc->desc = "PM";
+    /* Reason: part of VIA south bridge, does not exist stand alone */
+    dc->user_creatable = false;
     dc->vmsd = &vmstate_acpi;
-    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 }
 
 static const TypeInfo via_pm_info = {