tty: serial: jsm: add blank line after declarations

This patch fixes checkpatch.pl warning:

Missing a blank line after declarations.
Signed-off-by: NGimcuan Hui <gimcuan@gmail.com>
Acked-by: NGuilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/jsm/jsm_tty.c

@@ -124,6 +124,7 @@ static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
 static void jsm_tty_write(struct uart_port *port)
 {
 	struct jsm_channel *channel;
+
 	channel = container_of(port, struct jsm_channel, uart_port);
 	channel->ch_bd->bd_ops->copy_data_from_queue_to_uart(channel);
 }