drm/amd/powerplay: change method to set board parameters

Copy board parameters directly instead of set each parameter for
sienna_cichlid.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>