MOSFET: Add fingers

fet.py

@@ -12,8 +12,9 @@ class FET(LibrePDKStructure):
 		LibrePDKStructure.__init__(self, config, name)
 		self.have_bulk_tap = have_bulk_tap # enable tap for bulk
 
-		self.W = dims[0]
-		self.L = dims[1]
+		self.N = dims[0]
+		self.W = dims[1]
+		self.L = dims[2]
 
 		self.conlayer_name = config.get_pad_connection_layer() if contact_to is None else contact_to # Alternative contact layer