What does this MR do and why?
This is the initial MR for the ongoing work to convert TGSI shaders to NIR in radeonsi. In this MR, the
si_clear-* shaders have been converted to NIR. There will be a separate MR for the
si_create-*-query_result_cs shaders soon.
Link to the other MRs in the series:
MR 2: !25782 (merged)
MR 3: !25972