drm/amd/pm: Use gpu_metrics_v1_6 for SMUv13.0.6

Use gpu_metrics_v1_6 for SMUv13.0.6 to fill gpu metric info

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>