dlx: "revert" the QCOM hardware keystore

This is not working due to changes in the kernel.  It was
reverted for the M7 for the same reason.

Change-Id: I74ae2e8c3961cdafa95838413ff950b3b93730d3
Merge pull request #37 from crpalmer/keystore

dlx: "revert" the QCOM hardware keystore