tenderloin: Update recovery_keys.c

The default key mapping file in recovery is being updated to strip out
display_toggle and some ifs (see http://review.cyanogenmod.org/62724 ).
Technically the custom recovery keys file here shouldn't break
compilation, but this is a good oporunity to clean it up.

Change-Id: Id0d7290c70bddafedb9f7bd97459ef0e43f27a1f