ntoskrnl.exe: add CmRegisterCallback/CmUnRegisterCallback stub (try 2)

[Alexandre Julliard]

Austin English <austinenglish at gmail.com> writes:

> For https://bugs.winehq.org/show_bug.cgi?id=39384

I don't want to add a million stubs during code freeze. Could you please
mention if the patch actually allows the application to run, or if it's
only going to crash on the next stub?

-- 
Alexandre Julliard
julliard at winehq.org