pan/midgard: Support indirect UBO offsets

...in case we have arrays in a UBO block that we'd like to access
indirectly.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3352>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3352>
2 files changed