radeonsi: fix UINT/SINT clamping for 10-bit formats on <= CIK

The same PS epilog workaround as for 8-bit integer formats is required,
since the CB doesn't do clamping.

Fixes GL45-CTS.gtf32.GL3Tests.packed_pixels.packed_pixels*.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
(cherry picked from commit 066a117be77fdc2b29c8eafabb4e2c2fa902a18e)
6 files changed