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Since the "ownership" permament flag does not indicate if the TPM is currently owned, the state of TPM Ownership must be read via a Capability read of TPM_CAP_PROP_OWNER. This adds the "getownership" function. BUG=chromium-os:22172 TEST=x86-alex build & manual test Change-Id: I2fc9e933e891ba40190d008436b22496dced1c93 Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/24784 Reviewed-by: Will Drewry <wad@chromium.org>