refine supported sig alg print

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 769f8c6..f74ae65 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -2438,24 +2438,7 @@
             {
                 ret = -1;
                 mbedtls_printf( "unknown signature algorithm \"%s\"\n", q );
-                mbedtls_printf( "supported signature algorithms:\n" );
-                mbedtls_printf("\trsa_pkcs1_sha256 ");
-                mbedtls_printf("rsa_pkcs1_sha384 ");
-                mbedtls_printf("rsa_pkcs1_sha512\n");
-                mbedtls_printf("\tecdsa_secp256r1_sha256 ");
-                mbedtls_printf("ecdsa_secp384r1_sha384 ");
-                mbedtls_printf("ecdsa_secp521r1_sha512\n");
-                mbedtls_printf("\trsa_pss_rsae_sha256 ");
-                mbedtls_printf("rsa_pss_rsae_sha384 ");
-                mbedtls_printf("rsa_pss_rsae_sha512\n");
-                mbedtls_printf("\trsa_pss_pss_sha256 ");
-                mbedtls_printf("rsa_pss_pss_sha384 ");
-                mbedtls_printf("rsa_pss_pss_sha512\n");
-                mbedtls_printf("\ted25519 ");
-                mbedtls_printf("ed448 ");
-                mbedtls_printf("rsa_pkcs1_sha1 ");
-                mbedtls_printf("ecdsa_sha1\n");
-                mbedtls_printf( "\n" );
+                mbedtls_print_supported_sig_algs();
                 goto exit;
             }
         }