ASoc: msm: Add support for VoLTE

- Add VoLTE_STUB Front end dai for VoLTE stub session
- Add routing controls for VoLTE stub session

Change-Id: If2de711422320425dbb71ffcca88d78e354322bc
Signed-off-by: Helen Zeng <xiaoyunz@codeaurora.org>
4 files changed