xf86CursorScreenRec::HotX/Y contain 0 for PRIME slave screens.
Fixes incorrect HW cursor position on PRIME slave screens.
Also hoist the hotspot translation out from xf86ScreenSet/MoveCursor to
xf86Set/MoveCursor, since the hotspot position is a property of the
cursor, not the screen.
v2:
* Squash patches 1 & 2 of the v1 series, since it's basically the same
problem
* Use the master screen's xf86CursorScreenRec::HotX/Y instead of
CursorRec::bits->x/yhot, since CursorRec::bits can be NULL (Hans de
Goede)
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
011ce3297d