f85b7aa5d4
Make the rmu variable signed; otherwise the MAX2 has no effect and
work_count can end up being larger than 16.
Fixes INSTR_OPERAND_FAULTs in SuperTuxKart.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4707
Fixes: c6ed8bf77c ("panfrost: Fix uniform_count on Midgard")
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10507>