drm/amd/powerplay: move powerplay table operation out of smu_v11_0.c

move smu_v11_0_get_max_power_limit and smu_v11_0_set_thermal_range
function from smu_v11_0.c to asic specific _ppt.c to avoid powerplay
table conflict with different ASIC with smu11.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>