radeonsi: handle count_from_stream_output in a few IA_MULTI_VGT_PARAM cases
radeonsi: handle count_from_stream_output in a few IA_MULTI_VGT_PARAM cases

Reviewed-by: Nicolai Hähnle <0d0be6cf5ad662651be2dc5dfd44aa2b09d4c1cc@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler