drm/amdgpu/pm: support gpu_metrics sysfs interface for smu v14.0.2/3

support gpu_metrics sysfs interface for smu v14.0.2/3

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 60c30ba7)