radeonsi/sqtt: fix shader stage values
shader_stages_mask and others expect MESA_SHADER_* based values, not PIPE_SHADER_*... Without this the fragment shader wouldn't appear in the "Pipelines" pane of RGP. Fixes: c276bde3 ("radeonsi/sqtt: export shader code to RGP") Reviewed-by:Marek Olšák <marek.olsak@amd.com> Part-of: <mesa/mesa!13696> (cherry picked from commit 3de072aa)