This reverts commit 740f370d.

It turned out to be correct in the first place: a positive value should
be sent when the wheel is moved to the right, and a negative value when
moved to the left. This is the behavior expected by the Xorg evdev
driver. I must have had a remapping somewhere else in my system when
originally testing this. Testing on another system shows that the
unpatched kernel is correct.

Here is a bug report from Mandriva that brought the problem to my
attention:

    https://qa.mandriva.com/show_bug.cgi?id=44309#c19Signed-off-by: NDan Nicholson <dbn.lists@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>