serial: 8250_pericom: Use UART_LCR_DLAB

Use UART_LCR_DLAB instead of literal.
Reviewed-by: NJiri Slaby <jirislaby@kernel.org>
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220613075736.12283-2-ilpo.jarvinen@linux.intel.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_pericom.c

@@ -73,7 +73,7 @@ static void pericom_do_set_divisor(struct uart_port *port, unsigned int baud,
 			struct uart_8250_port *up = up_to_u8250p(port);
 			int lcr = serial_port_in(port, UART_LCR);
 
-			serial_port_out(port, UART_LCR, lcr | 0x80);
+			serial_port_out(port, UART_LCR, lcr | UART_LCR_DLAB);
 			serial_dl_write(up, divisor);
 			serial_port_out(port, 2, 16 - scr);
 			serial_port_out(port, UART_LCR, lcr);