fix serial output

target/mips/mikrotik-rb532/patches/3.15-rc5/rb532-serial.patch

@@ -0,0 +1,16 @@
+diff -Nur linux-3.15-rc5.orig/drivers/tty/serial/serial_core.c linux-3.15-rc5/drivers/tty/serial/serial_core.c
+--- linux-3.15-rc5.orig/drivers/tty/serial/serial_core.c	2014-05-09 22:10:52.000000000 +0200
++++ linux-3.15-rc5/drivers/tty/serial/serial_core.c	2014-05-16 10:33:53.000000000 +0200
+@@ -2685,12 +2685,6 @@
+ 	}
+ 
+ 	/*
+-	 * If the port is used as a console, unregister it
+-	 */
+-	if (uart_console(uport))
+-		unregister_console(uport->cons);
+-
+-	/*
+ 	 * Free the port IO and memory resources, if any.
+ 	 */
+ 	if (uport->type != PORT_UNKNOWN)