radeonsi: rename members of si_shader_output_values

Be a bit more verbose and avoid confusion in future patches.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 9ee1190..e496c50 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -55,8 +55,8 @@
 struct si_shader_output_values
 {
 	LLVMValueRef values[4];
-	unsigned name;
-	unsigned sid;
+	unsigned semantic_name;
+	unsigned semantic_index;
 };
 
 static void si_init_shader_ctx(struct si_shader_context *ctx,
@@ -2368,8 +2368,8 @@
 	}
 
 	for (i = 0; i < noutput; i++) {
-		semantic_name = outputs[i].name;
-		semantic_index = outputs[i].sid;
+		semantic_name = outputs[i].semantic_name;
+		semantic_index = outputs[i].semantic_index;
 		bool export_param = true;
 
 		switch (semantic_name) {
@@ -2890,8 +2890,8 @@
 	}
 
 	for (i = 0; i < info->num_outputs; i++) {
-		outputs[i].name = info->output_semantic_name[i];
-		outputs[i].sid = info->output_semantic_index[i];
+		outputs[i].semantic_name = info->output_semantic_name[i];
+		outputs[i].semantic_index = info->output_semantic_index[i];
 
 		for (j = 0; j < 4; j++)
 			outputs[i].values[j] =
@@ -6374,8 +6374,8 @@
 	for (i = 0; i < gsinfo->num_outputs; ++i) {
 		unsigned chan;
 
-		outputs[i].name = gsinfo->output_semantic_name[i];
-		outputs[i].sid = gsinfo->output_semantic_index[i];
+		outputs[i].semantic_name = gsinfo->output_semantic_name[i];
+		outputs[i].semantic_index = gsinfo->output_semantic_index[i];
 
 		for (chan = 0; chan < 4; chan++) {
 			args[2] = lp_build_const_int32(gallivm,