    Added callbacks for lane count changes, link rate changes
                    and pre-emphasis + voltage swing adjust requests.
3.0   als  10/07/15 Added MSA callback.
4.0   als  12/08/15 Added link rate and lane count validity check APIs:
                        XDp_IsLinkRateValid
                        XDp_IsLaneCountValid
                    XDp_TxAllocatePayloadVcIdTable now takes an additional
                    argument (StartTs, the starting timeslot).
                    Added RX API to get c