soc: qcom: Add support for EMMC storage type

Add support for parsing EMMC specific crypto engine type
in crypto qti tz driver.

Test:
Device booted upto UI with File Based Encryption enabled.

Change-Id: Id6354e69dc32a2c68ba81450e8a9c0e015779f4f
Signed-off-by: Santosh Dronamraju <sdronamr@codeaurora.org>