ASoC: Update routing driver for FFV and AFE Loopback

-Add routing driver changes for afe_loopback_tx
-Fluence FFV uses MM_DL9 to record data from PRI_MI2S_RX
port. Add route between MM_DL9 to PRI_MI2S_RX.

Change-Id: Ibadde79e76c99c12581b67b87c7830af6f5757e1
Signed-off-by: Sachin Mohan Gadag <sgadag@codeaurora.org>