drm/amdgpu/powerplay: add smu initialize funcitons for vangogh (v4)

This patch is to add smu initialize functions for vangogh.

v2: squash in updates
v3: drop duplicate table entries
v4: rebase fixes

Signed-off-by: Xiaojian Du <xiaojian.du@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>