Capture Volume set properly for ALC668

The properly set Capture Volume allows voice capture
during video recording.

Change-Id: Ie6285e5eceeca2d64aeaa86f1599d9acde96f649
Signed-off-by: Viorel Suman <viorel.suman@intel.com>
Reviewed-on: https://android.intel.com/177230
Tested-by: Vlaescu, CristianX <cristianx.vlaescu@intel.com>
Reviewed-by: Reus, Adriana <adriana.reus@intel.com>
Reviewed-by: Chiras, Robert <robert.chiras@intel.com>