hrtimer: convert kvm-ia64 to the new hrtimer apis

In order to be able to do range hrtimers we need to use accessor functions
to the "expire" member of the hrtimer struct.
This patch converts KVM-ia64 to these accessors.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 7a37d06..cf8eae1 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1112,7 +1112,7 @@
 	struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 
 	if (hrtimer_cancel(p_ht))
-		hrtimer_start(p_ht, p_ht->expires, HRTIMER_MODE_ABS);
+		hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
 }
 
 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)