bl2: add psa_util.c to list of crypto source files

psa_crypto_ecp.c and psa_crypto_rsa.c reference functions from
psa_util.c, e.g., mbedtls_psa_get_random, so it should be
included in the library build to get rid of linker errors such
as

arm-zephyr-eabi/bin/ld: bl2/libbl2_crypto.a(psa_crypto_ecp.o):
in function `mbedtls_psa_ecp_load_public_part':
/modules/crypto/mbedtls/library/psa_crypto_ecp.c:447:
undefined reference to `mbedtls_psa_get_random'

Change-Id: Iacf3fb97dd87d3dcb20b9302c383f4061e1371a6
Signed-off-by: Stefan Gloor <[email protected]>
(cherry picked from commit 019755de4c86aebdae557ea59577eafd292338fb)
Signed-off-by: Tim Pambor <[email protected]>

Author: tpambor

bl2/CMakeLists.txt

@@ -72,13 +72,15 @@ list(APPEND BL2_CRYPTO_SRC
     $<${build_sha_256}:${MBEDCRYPTO_PATH}/library/sha256.c>
     $<${build_sha_384}:${MBEDCRYPTO_PATH}/library/sha512.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/psa_crypto_ecp.c>
+    $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/psa_util.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/ecp.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/ecp_curves.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/ecdsa.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/bignum.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/bignum_core.c>
     $<$<AND:${is_ec_signature},$<NOT:${build_p256m}>>:${MBEDCRYPTO_PATH}/library/constant_time.c>
     $<${is_rsa_signature}:${MBEDCRYPTO_PATH}/library/psa_crypto_rsa.c>
+    $<${is_rsa_signature}:${MBEDCRYPTO_PATH}/library/psa_util.c>
     $<${is_rsa_signature}:${MBEDCRYPTO_PATH}/library/rsa.c>
     $<${is_rsa_signature}:${MBEDCRYPTO_PATH}/library/rsa_alt_helpers.c>
     $<${is_rsa_signature}:${MBEDCRYPTO_PATH}/library/bignum.c>