tty/serial: atmel_serial: bootconsole removed from auto-enumerates

Auto-enumerate mechanism conflicts with bootconsoles: remove
the usage counter for this type of consoles.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/tty/serial/atmel_serial.c

@@ -1674,7 +1674,6 @@ static int __init atmel_console_init(void)
 		int id = atmel_default_console_device->id;
 		struct atmel_uart_port *port = &atmel_ports[id];
 
-		set_bit(id, &atmel_ports_in_use);
 		port->backup_imr = 0;
 		port->uart.line = id;