docs: Add PSA Crypto SP security assessment

Add the security assessment of the PSA Crypto SP.

Change-Id: Icc47b9947854e4bdb6ab80a687a7c925aad21e8c
Signed-off-by: Imre Kis <imre.kis@arm.com>
Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
2 files changed