apexq/expressatt: allow gpu app locking

- Iommu on apexq/expressatt is not broken like d2 and
  does not cause watchdog timeouts on the modem

Change-Id: I98569b2d8e3c93be1050d43f455bbbe89c123e74
Merge "apexq/expressatt: allow gpu app locking" into cm-10.2