feat(bl): adding psa crypto - crypto_mod_finish()

Adding call to crypto_mod_finish() at the end of crypto usage in the
bl mains. This is currently used for psa crytpo to destroy the
psa_key_ids in the psa key store, but could be expanded if required
later.

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I3dba9fe87b6bb64b629dda9d6c4653b116e7ee62
2 files changed