eventq: convert all usage of events to use the new API.

For now, there is still a single global event queue, but this is
necessary for making the steps towards a parallelized m5.

src/cpu/memtest/memtest.cc

@@ -152,7 +152,7 @@ MemTest::MemTest(const Params *p)
     // set up counters
     noResponseCycles = 0;
     numReads = 0;
-    tickEvent.schedule(0);
+    schedule(tickEvent, 0);
 
     id = TESTER_ALLOCATOR++;
 
@@ -262,7 +262,7 @@ void
 MemTest::tick()
 {
     if (!tickEvent.scheduled())
-        tickEvent.schedule(curTick + ticks(1));
+        schedule(tickEvent, curTick + ticks(1));
 
     if (++noResponseCycles >= 500000) {
         cerr << name() << ": deadlocked at cycle " << curTick << endl;

src/cpu/memtest/memtest.hh

@@ -74,10 +74,10 @@ class MemTest : public MemObject
     {
       private:
         MemTest *cpu;
+
       public:
-        TickEvent(MemTest *c)
-            : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c) {}
-        void process() {cpu->tick();}
+        TickEvent(MemTest *c) : Event(CPU_Tick_Pri), cpu(c) {}
+        void process() { cpu->tick(); }
         virtual const char *description() const { return "MemTest tick"; }
     };