USB: serial: keyspan: Removed trailing whitespace.

Changes to conform with checkpatch.sh script. - trailing whitespace.
Removed 1 checkpatch.sh error.
Signed-off-by: Ben Minerds <puzzleduck@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/keyspan.c

@@ -559,7 +559,7 @@ static void	usa28_instat_callback(struct urb *urb)
 
 	if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
 		tty = tty_port_tty_get(&port->port);
-		if (tty && !C_CLOCAL(tty)) 
+		if (tty && !C_CLOCAL(tty))
 			tty_hangup(tty);
 		tty_kref_put(tty);
 	}