tty: serial: altera_jtaguart: Fixup type usage of port flags

port->flags is of type upf_t, which corresponds to UPF_* flags.

Signed-off-by: Tobias Klauser <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serial/altera_jtaguart.c

···
 	port->type = PORT_ALTERA_JTAGUART;
 	port->iotype = SERIAL_IO_MEM;
 	port->ops = &altera_jtaguart_ops;
-	port->flags = ASYNC_BOOT_AUTOCONF;
+	port->flags = UPF_BOOT_AUTOCONF;
 
 	uart_add_one_port(&altera_jtaguart_driver, port);