[Mesa-dev] MR: anv: fix clear color resolves

[Lionel Landwerlin]

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/50

Hi all,

We're having issues with clear color resolves when image views & images 
have different formats (for example image R8G8B8A8_UNORM & view 
R8G8B8A8_SRGB see https://bugs.freedesktop.org/show_bug.cgi?id=108911).
Jason suggested we get rid of clear color at the end of the render 
passes which is what this series implements.

Cheers,

-
Lionel