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USB4 v2 spec allows USB4 links that are part of a pass through tunnel (such as DisplayPort and USB 3.x Gen T) to enter lower CL states, which provide better power management. For this USB4 v2 routers in their path config space of lane 0 adapter include a new bit PMPS (PM packet support) that needs to be set. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>