serial: fsl_lpuart: Remove unnecessary clearing for CRTSCTS

if (termios->c_cflag & CRTSCTS) guarantees that CRTSCTS is not ever set
in the else block so clearing it is unnecessary.

While at it, remove also one pair of extra parenthesis.

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220513082906.11096-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/fsl_lpuart.c

@@ -2110,12 +2110,10 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
 	if (sport->port.rs485.flags & SER_RS485_ENABLED)
 		termios->c_cflag &= ~CRTSCTS;
 
-	if (termios->c_cflag & CRTSCTS) {
-		modem |= (UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
-	} else {
-		termios->c_cflag &= ~CRTSCTS;
+	if (termios->c_cflag & CRTSCTS)
+		modem |= UARTMODIR_RXRTSE | UARTMODIR_TXCTSE;
+	else
 		modem &= ~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
-	}
 
 	if (termios->c_cflag & CSTOPB)
 		bd |= UARTBAUD_SBNS;