drm/amd/powerplay: fix pcie dpm table for vega10

This resolves pcie low speed problem.

Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>