Revert "[PORT FROM R2]audio: sn95031: modify PCM2"

Revert "[PORT FROM R2]audio: sn95031: modify PCM2"

BZ: 30843

This reverts commit ce35adf759aab6fcc13754eb8db020a41d531c6b.

The patch reverted here causing some crackling noise issues.
The reverted patch was wrongly enabling PCM2 during voice
call.  The simultaneous enabling of both PCM2 and PCM1 during
voice call might cause crackling noise.

Fix the error by reverting patch #38989. This patch was added
to address the PCM2 enabling sequence as per the spec.  Reverting
the patch would not cause any functionality difference.

Change-Id: Iab9f9320428ae5a39002cb5dc4f99eb49002d1a9
Signed-off-by: Ramesh Babu K V <ramesh.babu@intel.com>
Reviewed-on: http://android.intel.com:8080/43103
Reviewed-by: Vinnakota, Lakshmi N <lakshmi.n.vinnakota@intel.com>
Reviewed-by: Gupta, ArvindX K <arvindx.k.gupta@intel.com>
Reviewed-by: Hibare, PramodX <pramodx.hibare@intel.com>
Tested-by: Hibare, PramodX <pramodx.hibare@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>