psa: Export "internally" mbedtls_md_info_from_psa()

Export mbedtls_md_info_from_psa() from psa_crypto.c
to make it available to psa_crypto_rsa/ecp.c.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 2f3d2e8..2176d9f 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1923,7 +1923,7 @@
     defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PSS) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_DETERMINISTIC_ECDSA)
-static const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg )
+const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg )
 {
     switch( alg )
     {