drm/amd/pm: Setup driver pptable for smu 15.0.8

drm/amd/pm: Setup driver pptable for smu 15.0.8

Setup driver pptable and initialize data from static metrics table for
smu_v15_0_8

v2: Remove unrelated changes and update description (Lijo)

v3: Use ARRAY_SIZE (Lijo)

v4: Move structure to header file

v5: squash in static metrics support (Asad)

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