r600g: fix sampler/ubo indexing on cayman

Cayman needs a different method to upload the CF IDX0/1

This fixes 31 piglits when ARB_gpu_shader5 is forced on
with cayman.

Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2 files changed