While the switch positions aren't explicitly labeled as on and off, we've heard
complaints about them being wrong. This patch changes the handling to match the
stock firmware.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44795 3c298f89-4303-0410-b956-a3cf2f4a3e73