[RFC PATCH] dxva2: Stub out DXVA-HD API.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=76377

Your paranoid android.


=== w2008s64 (32 bit report) ===

dxva2:
dxvahd: Timeout

=== w2008s64 (64 bit report) ===

dxva2:
dxvahd: Timeout