serial: imx: set_termios(): factor-out 'ucr2' initial value

Set common bits in a separate statement to make initialization
explicit and not repeat the common part.
Reviewed-by: NSascha Hauer <s.hauer@pengutronix.de>
Tested-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NSergey Organov <sorganov@gmail.com>
Reviewed-by: NUwe Kleine-Knig <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/1561558293-7683-3-git-send-email-sorganov@gmail.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -1562,10 +1562,9 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios,
 
 	spin_lock_irqsave(&sport->port.lock, flags);
 
+	ucr2 = UCR2_SRST | UCR2_IRTS;
 	if ((termios->c_cflag & CSIZE) == CS8)
-		ucr2 = UCR2_WS | UCR2_SRST | UCR2_IRTS;
-	else
-		ucr2 = UCR2_SRST | UCR2_IRTS;
+		ucr2 |= UCR2_WS;
 
 	if (termios->c_cflag & CRTSCTS) {
 		if (sport->have_rtscts) {