[8/9] setupapi: implement SetupPromptForDiskA by wrapping around W version

[Juan Lang]

Hi Ricardo,

+    DialogTitleW = MultiByteToUnicode(DialogTitle, CP_UTF8);
You should be using CP_ACP here, not CP_UTF8.  Same applies to
remaining character conversions.  In fact, you could use strdupAtoW
instead.
--Juan