efi: app: Print the final message before freeing memory

Printing may make use of tables which could go away when freed, so do
the free as the last thing before exiting the app.

Signed-off-by: Simon Glass <sjg@chromium.org>

lib/efi_client/efi_app.c

@@ -231,8 +231,8 @@ static void efi_exit(void)
 {
 	struct efi_priv *priv = efi_get_priv();
 
-	free_memory(priv);
 	printf("U-Boot EFI exiting\n");
+	free_memory(priv);
 	priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
 }