Crypto: tfm_builtin_key_loader uses PSA to do key derivation

Use PSA instead of mbed TLS API to perform the platform key derivation
required in the tfm_builtin_key_loader driver to obtain platform keys.
Make it disabled by default only to be enabled when the configuration
option TFM_BUILTIN_KEY_LOADER_DERIVE_KEY_USING_PSA is defined.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I41ea9cb2af6627aa7ed3a8454898d16d4b5d6306
2 files changed