sram_factory: Allow a prefered module name

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>

compiler/sram_factory.py

@@ -31,7 +31,7 @@ class sram_factory:
         """
         self.__init__()
         
-    def create(self, module_type, **kwargs):
+    def create(self, module_type, module_name=None, **kwargs):
         """
         A generic function to create a module with a given module_type.
         The args are passed directly to the module constructor.
@@ -72,6 +72,8 @@ class sram_factory:
             if obj_kwargs == kwargs:
                 return obj_item
 
+        # If no prefered module name is provided, we generate one.
+        if module_name is None:
             # Use the default  name if there are default arguments
             # This is especially for library cells so that the
             # spice and gds files can be found.