[PORT FROM R2] ADC driver patches

[PORT FROM R2] ADC driver patches

BZ: 17163

This BZ includes the following BZ:
11047, 10427, 12458, 13583, 15827

Change-Id: Ifb5bb6736820beec875157d67fd54f90bad85364
Signed-off-by: Li, Ning <ning.li@intel.com>
Reviewed-on: http://android.intel.com:8080/27160
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Reviewed-by: Du, Alek <alek.du@intel.com>
Reviewed-by: Koskinen, Ilkka <ilkka.koskinen@intel.com>
Reviewed-by: Zhang, Shijie <shijie.zhang@intel.com>
Tested-by: Wang, Zhifeng <zhifeng.wang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>