ASoC: soc: msm: add support for: USB loopback

Add FE dailink and relevant routes for USB loopback.

CRs-Fixed: 1091800
Change-Id: I37d9dee6ec8d39220be7099e6aa430055a3f05eb
Signed-off-by: Xiaojun Sang <xsang@codeaurora.org>
3 files changed