audio: ucm: Route voice call only after enabling device

- Voice call is sometimes enabled without enabling both Rx and
Tx device. This is resulting in improper configuration of
voice call
- Fix this problem by checking if both Rx and Tx devices are
enabled before routing voice call

Change-Id: Ie0850eb7d0beafe7db150138b3aff1b2696db591
2 files changed
tree: 3475f84943896e4b45a7632727004bfefe8b068a
  1. alsa_sound/
  2. libalsa-intf/