configs: Use integer division in MESI_Three_Level.py

Same as:

https://gem5-review.googlesource.com/c/public/gem5/+/42883

Change-Id: I99ea04b3c6e1d2ce3ac8419440e0e949711d3b07
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/43485
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
diff --git a/configs/ruby/MESI_Three_Level.py b/configs/ruby/MESI_Three_Level.py
index 91ccb58..b1fd281 100644
--- a/configs/ruby/MESI_Three_Level.py
+++ b/configs/ruby/MESI_Three_Level.py
@@ -78,10 +78,10 @@
     dma_cntrl_nodes = []
 
     assert (options.num_cpus % options.num_clusters == 0)
-    num_cpus_per_cluster = options.num_cpus / options.num_clusters
+    num_cpus_per_cluster = options.num_cpus // options.num_clusters
 
     assert (options.num_l2caches % options.num_clusters == 0)
-    num_l2caches_per_cluster = options.num_l2caches / options.num_clusters
+    num_l2caches_per_cluster = options.num_l2caches // options.num_clusters
 
     l2_bits = int(math.log(num_l2caches_per_cluster, 2))
     block_size_bits = int(math.log(options.cacheline_size, 2))