asoc: routing: add support for echo reference on PRI_TDM_RX_1

During HFP call TDM Tx port needs ec ref port for echo
cancellation. So set PRI_TDM_RX1 port id to EC ref port.

Change-Id: Ic8f69d645a0650804d756de4475b718e2598b9b9
Signed-off-by: Bala Kishore Pati <balakishorepati@codeaurora.org>