hrtimer: convert sound/ 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 sound/ to these accessors.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index e341f3f..1f42e40 100644
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -34,7 +34,7 @@
 		chip->thalf = 0;
 		if (!atomic_read(&chip->timer_active))
 			return HRTIMER_NORESTART;
-		hrtimer_forward(&chip->timer, chip->timer.expires,
+		hrtimer_forward(&chip->timer, hrtimer_get_expires(&chip->timer),
 				ktime_set(0, chip->ns_rem));
 		return HRTIMER_RESTART;
 	}
@@ -118,7 +118,8 @@
 	chip->ns_rem = PCSP_PERIOD_NS();
 	ns = (chip->thalf ? PCSP_CALC_NS(timer_cnt) : chip->ns_rem);
 	chip->ns_rem -= ns;
-	hrtimer_forward(&chip->timer, chip->timer.expires, ktime_set(0, ns));
+	hrtimer_forward(&chip->timer, hrtimer_get_expires(&chip->timer),
+							ktime_set(0, ns));
 	return HRTIMER_RESTART;
 
 exit_nr_unlock2: