PSA_KEY_TYPE_DERIVE is always available

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/psa/crypto_config.h b/include/psa/crypto_config.h
index 8d15c58..a4d11c9 100644
--- a/include/psa/crypto_config.h
+++ b/include/psa/crypto_config.h
@@ -70,6 +70,7 @@
 #define PSA_WANT_ALG_SHA_512                    1
 #define PSA_WANT_ALG_TLS12_PRF                  1
 #define PSA_WANT_ALG_TLS12_PSK_TO_MS            1
+#define PSA_WANT_KEY_TYPE_DERIVE                1
 #define PSA_WANT_KEY_TYPE_HMAC                  1
 #define PSA_WANT_KEY_TYPE_ECC_KEY_PAIR          1
 #define PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY        1