radeonsi: replace si_shader_context::soa by bld_base

We no longer need to use lp_build_tgsi_soa_context.

No regressions founds with full piglit run.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
3 files changed