Implement memory estimation for AMDGPUs.

Stable.

modules/dml/optimizer/intel/__init__.py

@@ -1,7 +1,7 @@
 from modules.dml.optimizer.optimizer import Optimizer
 
 class IntelOptimizer(Optimizer):
-    def memory_stats():
+    def memory_stats(index):
         raise NotImplementedError()
         # DML TODO: Implement
         return