tests: Update x86 system.py for MemCtrl interface

Change-Id: If4103b197720f74df70d0a24602e2b3715936826
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34315
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: mike upton <michaelupton@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/tests/gem5/x86-boot-tests/system/system.py b/tests/gem5/x86-boot-tests/system/system.py
index b050b6f..7b9bd68 100755
--- a/tests/gem5/x86-boot-tests/system/system.py
+++ b/tests/gem5/x86-boot-tests/system/system.py
@@ -171,8 +171,8 @@
 
     def _createMemoryControllers(self, num, cls):
         self.mem_cntrls = [
-            cls(range = self.mem_ranges[0],
-                port = self.membus.master)
+            MemCtrl(dram = cls(range = self.mem_ranges[0]),
+                    port = self.membus.master)
             for i in range(num)
         ]