libinput: normalize WL_CALIBRATION before passing it to libinput

libinput: normalize WL_CALIBRATION before passing it to libinput

WL_CALIBRATION, introduced in weston-1.1, requires the translation component
of the calibration matrix to be in screen coordinates. libinput does not have
access to this and it's not a very generic way to do this anyway. So with
the libinput backend, WL_CALIBRATION support is currently broken (#82742).
This cannot be fixed in libinput without changing its API for this specific
use-case.

This patch lets weston take care of WL_CALIBRATION. It takes the original
format and normalizes it before passing it to libinput. This way libinput
still does the coordinate transformation, weston just needs to provide the
initial configuration.

Note that this needs an updated libinput, otherwise libinput will try to
transform coordinates as well.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=82742
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>