psa: Export "internally" mbedtls_cipher_info_from_psa

Export "internally" mbedtls_cipher_info_from_psa to be
able to use it in psa_crypto_cipher.c.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 3c8b97d..94d0c05 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2310,7 +2310,7 @@
 /* MAC */
 /****************************************************************/
 
-static const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
+const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
     psa_algorithm_t alg,
     psa_key_type_t key_type,
     size_t key_bits,