qseecom: Add support for PFE feature

Add key management support for crypto HW used for
PFE (per file encryption) features.

Change-Id: Ic0664973d9a4099f76d7b3040f0f81df8465cf71
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>