Mesa 23.1 branchpoint
ac,aco: move gfx10 ngg prim count zero workaround to nir

To simplify both llvm and aco backend and remove unnecessary
workaround code where prim count is known to be not zero.

Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22381>
5 files changed