soc: qcom: crypto-qti-hwkm: add wrapped raw secret

Add support to derive raw secret using HWKM instead
of using a plaintext value from the exported key.
This raw secret that is derived using HWKM is used
to derive the key identifier in fscrypt and also the
filenames encryption key.

Change-Id: Id1401555a2d01354753cbe708eb23dc091d2589f
Signed-off-by: Gaurav Kashyap <gaurkash@codeaurora.org>