drm/amdgpu: add si implementation v10

v5: rebase fixes
v6: add mgcg arrays
v7: rebase fixes
v8: rebase fixes
v9: add get_disabled_bios(), make get_xclk static
v10: fix oland and hainan asic specific handle at si_program_aspm

Signed-off-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>