inorder-stats: add prereq to basic stat

only show requests processed when the resource is actually in use

src/cpu/inorder/resource.cc

@@ -81,7 +81,8 @@ Resource::regStats()
     instReqsProcessed
         .name(name() + ".instReqsProcessed")
         .desc("Number of Instructions Requests that completed in "
-              "this resource.");
+              "this resource.")
+        .prereq(instReqsProcessed);
 }
 
 int

src/cpu/inorder/resources/inst_buffer.cc

@@ -52,7 +52,8 @@ InstBuffer::regStats()
 {
     instsBypassed
         .name(name() + ".instsBypassed")
-        .desc("Number of Instructions Bypassed.");
+        .desc("Number of Instructions Bypassed.")
+        .prereq(instsBypassed);    
 
     Resource::regStats();
 }