Add registry option "Split Controllers" and optionally split joysticks
with more than 6 axes to improve compatibility with applications that
do not support more than 6 axes where on Windows a driver would be
installed that splits the device.
Signed-off-by: Timo Zuccarello <timo@zuccarello.eu>
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>