serial: Use UPF_* constants with struct uart_port flags

Fix ASYNC_* constant usage that should be the corresponding UPF_*
constant.

CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: devicetree@vger.kernel.org
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c
index fab4d6a..bc896dc 100644
--- a/drivers/tty/serial/mcf.c
+++ b/drivers/tty/serial/mcf.c
@@ -537,7 +537,7 @@
 		port->iotype = SERIAL_IO_MEM;
 		port->irq = platp[i].irq;
 		port->uartclk = MCF_BUSCLK;
-		port->flags = ASYNC_BOOT_AUTOCONF;
+		port->flags = UPF_BOOT_AUTOCONF;
 		port->ops = &mcf_uart_ops;
 	}
 
@@ -662,7 +662,7 @@
 		port->irq = platp[i].irq;
 		port->uartclk = MCF_BUSCLK;
 		port->ops = &mcf_uart_ops;
-		port->flags = ASYNC_BOOT_AUTOCONF;
+		port->flags = UPF_BOOT_AUTOCONF;
 
 		uart_add_one_port(&mcf_driver, port);
 	}