stdlib: Change #virtual_networks of mesi_two_level to 3

A grep of "virtual_network" in src/mem/ruby/protocol shows that
files in MESI_Two_Level.slicc utilizes at 3 virtual networks.

Change-Id: I3e8dd09dd82b9c802fdf91145c6d998bc6db541b
Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65592
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/python/gem5/components/cachehierarchies/ruby/mesi_two_level_cache_hierarchy.py b/src/python/gem5/components/cachehierarchies/ruby/mesi_two_level_cache_hierarchy.py
index 82089a5..79c8b0a 100644
--- a/src/python/gem5/components/cachehierarchies/ruby/mesi_two_level_cache_hierarchy.py
+++ b/src/python/gem5/components/cachehierarchies/ruby/mesi_two_level_cache_hierarchy.py
@@ -83,11 +83,11 @@
 
         self.ruby_system = RubySystem()
 
-        # MESI_Two_Level needs 5 virtual networks
-        self.ruby_system.number_of_virtual_networks = 5
+        # MESI_Two_Level needs 3 virtual networks
+        self.ruby_system.number_of_virtual_networks = 3
 
         self.ruby_system.network = SimplePt2Pt(self.ruby_system)
-        self.ruby_system.network.number_of_virtual_networks = 5
+        self.ruby_system.network.number_of_virtual_networks = 3
 
         self._l1_controllers = []
         for i, core in enumerate(board.get_processor().get_cores()):