audio: Fix the device switch delay issue during voice call

- During voice call, the device switch from earpiece to speaker or
  vice versa takes more than 3.5sec which is not acceptable.
- The mixer controls for speaker devices are incorrect which results
  slimbus errors while switching from speaker to earpiece.
- Corrected the speaker device mixer controls to fix the issue.

Change-Id: I202f3389c85368f47a0b2690c037423baa50d280
1 file changed