broadcom/compiler: Enable PER_QUAD for UBO and SSBO loads.

Helper invocations need to be able to read from UBOs since those values
can be used for flow control, but writes from helper invocations need to
be dropped.

Fixes CTS tests:
  dEQP-VK.glsl.derivate.*.uniform_loop.*

Reviewed-by: Alejandro PiƱeiro <apinheiro@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6356>
1 file changed