radeonsi: si_blit_decompress_depth is only used for staging
radeonsi: si_blit_decompress_depth is only used for staging

Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler