tty: max3100: use msecs_to_jiffies for time conversion

This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index 79f9a9e..0773772 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -782,7 +782,7 @@
 	pdata = dev_get_platdata(&spi->dev);
 	max3100s[i]->crystal = pdata->crystal;
 	max3100s[i]->loopback = pdata->loopback;
-	max3100s[i]->poll_time = pdata->poll_time * HZ / 1000;
+	max3100s[i]->poll_time = msecs_to_jiffies(pdata->poll_time);
 	if (pdata->poll_time > 0 && max3100s[i]->poll_time == 0)
 		max3100s[i]->poll_time = 1;
 	max3100s[i]->max3100_hw_suspend = pdata->max3100_hw_suspend;