Input: wistron - fix typo in keymap for Acer TM610

This patch fixes typo that prevented PROG2 key from working
on Acer Travelmate 610.

Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>