drm/amd/pm: Use separate metrics table for smu_v13_0_12

Use separate metrics table for smu_v13_0_12 and fetch metrics data using
that.

v2: Fix jpeg busy indexing (Lijo)

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>