tty: move obsolete and broken generic_serial drivers to drivers/staging/generic_serial/

As planned by Arnd Bergmann, this moves the following drivers to the
drivers/staging/generic_serial directory where they will be removed
after 2.6.41 if no one steps up to claim them.
	generic_serial
	rio
	ser_a2232
	sx
	vme_scc

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index fb1fc4e..58e4a8e 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -43,6 +43,8 @@
 
 source "drivers/staging/tty/Kconfig"
 
+source "drivers/staging/generic_serial/Kconfig"
+
 source "drivers/staging/et131x/Kconfig"
 
 source "drivers/staging/slicoss/Kconfig"