[Rebase from R2]audio: mfld_machine: Added correct ignore suspend call for headphones

[Rebase from R2]audio: mfld_machine: Added correct ignore suspend call for headphones

BZ: 19775

** Correcting the bugzilla id for R3 Merge
old-bugid :16450
A button press on the HS in S3 state lead to the headphone downlink path
being shutdown. This was due to the ignore_suspend flag not being set for the
proper widget.

Added an ignore suspend flag for the proper widget (Headphones, not HPOUTL/R).

Also, DMIC3 is not used, so disabled that pin. An unused variable
(mfld_jack_pins) is removed.

Change-Id: I3d5fa711f236e2479ec9af2908454498bee2d9fc
Signed-off-by: Omair Mohammed Abdullah <omair.m.abdullah@intel.com>
Reviewed-on: http://android.intel.com:8080/27328
Reviewed-by: M, Arulselvan <arulselvan.m@intel.com>
Tested-by: M, Arulselvan <arulselvan.m@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>