Revert "dlx: use QCOM hardware keystore"

This reverts commit 2103ab3b87dca81a0f21a6bf6c16010752436cd2.

Change-Id: If8d73dfad8ab5bcdee80af2e71644cbf30573c8a
Merge "Revert "dlx: use QCOM hardware keystore"" into cm-11.0