configs: Add missing requestToMemory MessageBuffers

In commit 53b6e21 two protocol config files were missed when the new
requestToMemory MessageBuffers were added. This fixes the issue such
that all Ruby protocols are working again.

Change-Id: Iaa04c792eaf6d659ba13c19f003e7e31b71ffdb4
JIRA: https://gem5.atlassian.net/browse/GEM5-468
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28187
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs/ruby/MESI_Three_Level.py

@@ -229,6 +229,7 @@ def create_system(options, full_system, system, dma_ports, bootmem,
         dir_cntrl.responseToDir.slave = ruby_system.network.master
         dir_cntrl.responseFromDir = MessageBuffer()
         dir_cntrl.responseFromDir.master = ruby_system.network.slave
+        dir_cntrl.requestToMemory = MessageBuffer()
         dir_cntrl.responseFromMemory = MessageBuffer()
 
     for i, dma_port in enumerate(dma_ports):

configs/ruby/MOESI_AMD_Base.py

@@ -277,6 +277,8 @@ def create_system(options, full_system, system, dma_devices, bootmem,
 
         dir_cntrl.triggerQueue = MessageBuffer(ordered = True)
         dir_cntrl.L3triggerQueue = MessageBuffer(ordered = True)
+
+        dir_cntrl.requestToMemory = MessageBuffer()
         dir_cntrl.responseFromMemory = MessageBuffer()
 
         exec("system.dir_cntrl%d = dir_cntrl" % i)