Added check for XBOX in addition to Xbox and X-Box

src/joystick/SDL_gamecontroller.c

@@ -892,7 +892,7 @@ static ControllerMapping_t *SDL_PrivateGetControllerMappingForNameAndGUID(const
 #endif /* __LINUX__ */
 
     if (!mapping && name) {
-        if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box")) {
+        if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box") || SDL_strstr(name, "XBOX")) {
             mapping = s_pXInputMapping;
         }
     }