w1: fix test in ds2482_wait_1wire_idle()

With `while (++retries < DS2482_WAIT_IDLE_TIMEOUT)' retries reaches
DS2482_WAIT_IDLE_TIMEOUT after the loop

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/w1/masters/ds2482.c

@@ -214,7 +214,7 @@ static int ds2482_wait_1wire_idle(struct ds2482_data *pdev)
 			 (++retries < DS2482_WAIT_IDLE_TIMEOUT));
 	}
 
-	if (retries > DS2482_WAIT_IDLE_TIMEOUT)
+	if (retries >= DS2482_WAIT_IDLE_TIMEOUT)
 		printk(KERN_ERR "%s: timeout on channel %d\n",
 		       __func__, pdev->channel);