kvm: Remove unneeded memory slot reservation

The number of slots and the location of private ones changed several
times in KVM's early days. However, it's stable since 2.6.29 (our
required baseline), and slots 8..11 are no longer reserved since then.
So remove this unneeded restriction.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

kvm-all.c

@@ -91,10 +91,6 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
     int i;
 
     for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
-        /* KVM private memory slots */
-        if (i >= 8 && i < 12) {
-            continue;
-        }
         if (s->slots[i].memory_size == 0) {
             return &s->slots[i];
         }