KVM: selftests: Lower the min virtual address for misc page allocations

Reduce the minimum virtual address of page allocations from 0x10000 to
KVM_UTIL_MIN_VADDR (0x2000).  Both values appear to be completely
arbitrary, and reducing the min to KVM_UTIL_MIN_VADDR will allow for
additional consolidation of code.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622200529.3650424-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -1292,7 +1292,7 @@ vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
  */
 vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages)
 {
-	return vm_vaddr_alloc(vm, nr_pages * getpagesize(), 0x10000, 0, 0);
+	return vm_vaddr_alloc(vm, nr_pages * getpagesize(), KVM_UTIL_MIN_VADDR, 0, 0);
 }
 
 /*