spelling: s/retreive/retrieve/

Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index af18355..4e9637e 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -357,7 +357,7 @@
 			} while (retval != 5 && retval != ENODEV);
 
 			if (retval != 5) {
-				err("%s - failed to retreive serial line settings - %d", __FUNCTION__, retval);
+				err("%s - failed to retrieve serial line settings - %d", __FUNCTION__, retval);
 				return retval;
 			} else {
 				spin_lock_irqsave(&priv->lock, flags);