anv: handle mesh shaders with max primitives == 0
Closes: #7854 (closed)
Note: the first two commits are from !20050 (merged). (merged via !20292 (merged))
Edited by Marcin Ślusarz
Closes: #7854 (closed)
Note: the first two commits are from !20050 (merged). (merged via !20292 (merged))