drm/amd/powerplay: remove header of smu_v11_0_pptable

different ASICs have different pptables, so the header will move
to asic source code to implement.

Signed-off-by: Kevin Wang <Kevin1.Wang@amd.com>
Reviewed-by: Huang Rui <Ray.Huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>