[Mesa-dev] MR: anv: don't do partial resolve on layer > 0

[Lionel Landwerlin]

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/40

A couple of bugs have been reported on multisampled & multilayered 
surfaces in Anv.
After having found what I thought was a workaround, it turned out to be 
an actual fix.

Please visit the URL above for a full explanation.

I also wrote a crucible test for this : 
https://patchwork.freedesktop.org/patch/265741/
It's really straight forward, so if you consider reviewing this, please 
look at the test too :)

Cheers,

-
Lionel