current_uclk in gpu_metrics on SMU 13.0.7 have not been updated

SMU 13.0.7 (Navi33, RX 7600 /XT) actually supports metrics->CurrClock[PPCLK_UCLK] and is used as the value of AMDGPU_PP_SENSOR_GFX_MCLK.
However, current_uclk in gpu_metrics has not been updated, which means that it is not supported in programs that use gpu_metrics sysfs directly.

• https://gitlab.freedesktop.org/agd5f/linux/-/blob/amd-staging-drm-next/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

Original issue: https://github.com/flightlessmango/MangoHud/issues/1205