HID: wacom: bits shifted too much for 9th and 10th buttons

HID: wacom: bits shifted too much for 9th and 10th buttons

BugLink: http://bugs.launchpad.net/bugs/1723145
commit ce06760ba46b66dae50f2519ae76bd15e89b5710 upstream.

Cintiq 12 has 10 expresskey buttons. The bit shift for the last
two buttons were off by 5.

Fixes: c7f0522 ("HID: wacom: Slim down wacom_intuos_pad processing")
Signed-off-by: Ping Cheng <ping.cheng@wacom.com>
Tested-by: Matthieu Robin <matthieu@macolu.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>