[PORT FROM R2] Revert "atomisp: fix alloc pages block issue in driver."

[PORT FROM R2] Revert "atomisp: fix alloc pages block issue in driver."

BZ: 17272

Issues:
Phone reset in low memory condition when doing burst capture.

Solution:
Suspect the patch in memory allocation in atomisp driver.
So revert this patch first.

Change-Id: Id7a985e86481a1de01a4b7e3360a61dfc342f64c
Orig-Change-Id: I8d49403963a8c2c7e9c097b60f439f3458bf2756
Signed-off-by: Hu Gang <gang.a.hu@intel.com>
Reviewed-on: http://android.intel.com:8080/26678
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
Reviewed-on: http://android.intel.com:8080/28051
Reviewed-by: Tuominen, TeemuX <teemux.tuominen@intel.com>