Fix never-executed key agreement test cases

These test cases were backported from 3.x and use FFDH. 2.28 doesn't have
FFDH. 2.28 doesn't have a key agreement other than ECDH, so use 0 in the
policy, which still allows the key to be created.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index 718b10c..f74cc9e 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -789,8 +789,8 @@
 agreement_key_policy:0:PSA_ALG_KEY_AGREEMENT(PSA_ALG_ECDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_KEY_AGREEMENT(PSA_ALG_ECDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_ERROR_NOT_PERMITTED
 
 PSA key policy: agreement + KDF, wrong agreement algorithm
-depends_on:PSA_WANT_ALG_ECDH:PSA_WANT_ALG_FFDH:PSA_WANT_ALG_HKDF:PSA_WANT_ALG_SHA_256:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR:MBEDTLS_PK_PARSE_C:PSA_WANT_ECC_SECP_R1_256
-agreement_key_policy:PSA_KEY_USAGE_DERIVE:PSA_ALG_KEY_AGREEMENT(PSA_ALG_ECDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_KEY_AGREEMENT(PSA_ALG_FFDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_ERROR_NOT_PERMITTED
+depends_on:PSA_WANT_ALG_ECDH:PSA_WANT_ALG_HKDF:PSA_WANT_ALG_SHA_256:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR:MBEDTLS_PK_PARSE_C:PSA_WANT_ECC_SECP_R1_256
+agreement_key_policy:PSA_KEY_USAGE_DERIVE:PSA_ALG_KEY_AGREEMENT(0, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_KEY_AGREEMENT(PSA_ALG_ECDH, PSA_ALG_HKDF(PSA_ALG_SHA_256)):PSA_ERROR_NOT_PERMITTED
 
 PSA key policy: agreement + KDF, wrong KDF algorithm
 depends_on:PSA_WANT_ALG_ECDH:PSA_WANT_ALG_HKDF:PSA_WANT_ALG_SHA_224:PSA_WANT_ALG_SHA_256:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR:MBEDTLS_PK_PARSE_C:PSA_WANT_ECC_SECP_R1_256
@@ -809,8 +809,8 @@
 raw_agreement_key_policy:0:PSA_ALG_ECDH:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_ECDH:PSA_ERROR_NOT_PERMITTED
 
 PSA key policy: raw agreement, wrong algorithm
-depends_on:PSA_WANT_ALG_ECDH:PSA_WANT_ALG_FFDH:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR:MBEDTLS_PK_PARSE_C:PSA_WANT_ECC_SECP_R1_256
-raw_agreement_key_policy:PSA_KEY_USAGE_DERIVE:PSA_ALG_ECDH:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_FFDH:PSA_ERROR_NOT_PERMITTED
+depends_on:PSA_WANT_ALG_ECDH:PSA_WANT_KEY_TYPE_ECC_KEY_PAIR:MBEDTLS_PK_PARSE_C:PSA_WANT_ECC_SECP_R1_256
+raw_agreement_key_policy:PSA_KEY_USAGE_DERIVE:0:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_SECP_R1):"49c9a8c18c4b885638c431cf1df1c994131609b580d4fd43a0cab17db2f13eee":PSA_ALG_ECDH:PSA_ERROR_NOT_PERMITTED
 
 PSA key policy: raw agreement, key permits raw agreement, but algorithm is not raw
 depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_ECP_C:PSA_WANT_ECC_SECP_R1_256:MBEDTLS_ECDH_C