The D-Link DIR-645 currently uses an incorrect logic level for its
buttons.
Correct them in order to prevent unintentional activation of failsafe
mode.
Reported-by: Perry Melange <isprotejesvalkata@gmail.com>
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 929e8f0f553637076f2612fb1c2225c5cee1f7ab)