build/efinix: Fix VHDL support.

litex/build/efinix/efinity.py

@@ -191,11 +191,10 @@ def _build_xml(family, device, timing_model, build_name, sources):
 
     # Add Design Sources.
     for filename, language, library in sources:
-        if ".vh" not in filename:
         et.SubElement(design_info, "efx:design_file", {
             "name"    : filename,
             "version" : "default",
-                "library" : "default",
+            "library" : "default" if ".vh" not in filename else library,
         })
 
     # Add Timing Constraints.