sound: oss: au1550_ac97: simplify au1550_delay()

au1550_delay() uses loop with schedule_timeout() to unconditionally wait
for msec. Use schedule_timeout_uninteruptible() instead.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/oss/au1550_ac97.c b/sound/oss/au1550_ac97.c
index 0fd256c..c4a4cdc 100644
--- a/sound/oss/au1550_ac97.c
+++ b/sound/oss/au1550_ac97.c
@@ -163,19 +163,10 @@
 static void
 au1550_delay(int msec)
 {
-	unsigned long   tmo;
-	signed long     tmo2;
-
 	if (in_interrupt())
 		return;
 
-	tmo = jiffies + (msec * HZ) / 1000;
-	for (;;) {
-		tmo2 = tmo - jiffies;
-		if (tmo2 <= 0)
-			break;
-		schedule_timeout(tmo2);
-	}
+	schedule_timeout_uninterruptible(msecs_to_jiffies(msec));
 }
 
 static u16