radeonsi: don't count special outputs for the VS export count

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

src/gallium/drivers/radeonsi/si_state_shaders.c

@@ -182,8 +182,13 @@ static void si_shader_vs(struct si_shader *shader)
 	for (nparams = 0, i = 0 ; i < info->num_outputs; i++) {
 		switch (info->output_semantic_name[i]) {
 		case TGSI_SEMANTIC_CLIPVERTEX:
+		case TGSI_SEMANTIC_CLIPDIST:
+		case TGSI_SEMANTIC_CULLDIST:
 		case TGSI_SEMANTIC_POSITION:
 		case TGSI_SEMANTIC_PSIZE:
+		case TGSI_SEMANTIC_EDGEFLAG:
+		case TGSI_SEMANTIC_VIEWPORT_INDEX:
+		case TGSI_SEMANTIC_LAYER:
 			break;
 		default:
 			nparams++;