lil refactor

include/gpu_metrics.hpp

@@ -13,7 +13,7 @@ https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/amd/include/kgd_pp
 #define MAX_XCC 8
 #define NUM_XCP 8
 
-namespace gpu {
+namespace metrics {
 
 struct metrics_table_header {
     uint16_t structure_size;