asoc: routing: set/clear FE/BE route for lsm

Set/clear correct FE/BE route for LSM in LSM put funtion
to avoid mixer control initial value is not set from userspace
after audio server restart.

Change-Id: Ic415bb51cbaf887c4ddacf9e7062ec28a36674e4
Signed-off-by: Meng Wang <mengw@codeaurora.org>