ENGR00234466 UART: Fix disablement of CTS signal

On Uart driver, CTS signal were never disabled
on the imx_set_mctrl function since the register was
written inside of the conditional.
        if (mctrl & TIOCM_RTS) {
                temp |= UCR2_CTS;
                writel(temp, sport->port.membase + UCR2);
        }

Signed-off-by: Alejandro Sierra <b18039@freescale.com>

drivers/tty/serial/imx.c

@@ -710,10 +710,10 @@ static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl)
 
 	temp = readl(sport->port.membase + UCR2) & ~UCR2_CTS;
 
-	if (mctrl & TIOCM_RTS) {
+	if (mctrl & TIOCM_RTS)
 		temp |= UCR2_CTS;
-		writel(temp, sport->port.membase + UCR2);
-	}
+
+	writel(temp, sport->port.membase + UCR2);
 
 	if (mctrl & TIOCM_LOOP) {
 		temp = readl(sport->port.membase + UTS) & ~UTS_LOOP;