This patch adds reporting of distance of tool to the tablet surface. Maximum
reported value is 63 (0x3F).
Signed-off-by: NPrzemo Firszt <przemo@firszt.eu>
Acked-by: NPeter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>