feat: add amdgpu support

Author: Tbusk

src/Managers/Process.vala

@@ -345,6 +345,7 @@ public class Monitor.Process : GLib.Object {
                     var splitted_line = line.split (":");
                     switch (splitted_line[0]) {
                     // for i915 there is only drm-engine-render to check
+                    case "drm-engine-gfx":
                     case "drm-engine-render":
                         drm_driver.engine_render = uint64.parse (splitted_line[1].strip ().split (" ")[0]);
                         if (last_drm_driver_engine_render != 0) {