staging: Remove useless "default N" lines

Two Kconfig entries default to (uppercase) "N". It was clearly intended
to use "default n". But since (lowercase) "n" is the default anyway,
these lines might as well be removed.

Reported-by: Martin Walch <walch.martin@web.de>
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>