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[Why] We need to update the hdcp display parameter whenever the link is updated, so the next time there is an update to hdcp we have the latest display info [How] Create a callback, and use this anytime there is a change in the link. This will be used later by the dm. Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>