Keep raw PSK when set via mbedtls_ssl_conf_psk() and feed as input_bytes

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index a22d97f..095db8f 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -65,10 +65,10 @@
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     if( ! mbedtls_svc_key_id_is_null( conf->psk_opaque ) )
         return( 1 );
-#else
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
     if( conf->psk != NULL && conf->psk_len != 0 )
         return( 1 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     return( 0 );
 }