- Unbreak UP. mp_maxid is not defined on uni-processor machines, although

I believe it and the other MP variables should be.  For now, just define it
   here and wait for jhb to clean it up later.

Approved by:	re (rwatson)

sys/vm/uma_core.c

@@ -126,6 +126,14 @@ static int uma_boot_free = 0;
 /* Is the VM done starting up? */
 static int booted = 0;
 
+/*
+ * Rather than #ifdef SMP all over, just give us a bogus definition for
+ * this on UP.
+ */
+#ifndef SMP
+static int mp_maxid = 1;
+#endif
+
 /*
  * This is the handle used to schedule events that need to happen
  * outside of the allocation fast path.