Change option name for the gridless router

compiler/modules/sram_1bank.py

@@ -255,8 +255,8 @@ class sram_1bank(design, verilog, lef):
             return
         elif OPTS.route_supplies == "grid":
             from openram.router import supply_grid_router as router
-        elif OPTS.route_supplies == "navigation":
-            from openram.router import hanan_router as router
+        elif OPTS.route_supplies == "graph":
+            from openram.router import graph_router as router
         else:
             from openram.router import supply_tree_router as router
         rtr=router(layers=self.supply_stack,

compiler/router/__init__.py

@@ -8,4 +8,4 @@ from .signal_escape_router import *
 from .signal_router import *
 from .supply_grid_router import *
 from .supply_tree_router import *
-from .hanan_router import *
+from .graph_router import *