evdev: Use has_abs only for ABS_X and ABS_Y, introduce has_mt for MT events
evdev: Use has_abs only for ABS_X and ABS_Y, introduce has_mt for MT events

We split up has_abs into plain ABS_X/Y and MT events, but this shouldn't
introduce any logic changes.

kwm81/weston,eyolfson/weston,Gnurou/weston,udoprog/weston,krezovic/weston,sir-murray/weston,mchalupa/weston,jonnylamb/weston,Fantu/compositor-spice,Fantu/compositor-spice,jonnylamb/weston,xorgy/weston,eyolfson/weston,sir-murray/weston,krezovic/weston,Gnurou/weston,udoprog/weston,Fantu/compositor-spice,Tarnyko/weston-xdg_surface_present,giucam/weston,mchalupa/weston,kwm81/weston,xorgy/weston,Tarnyko/weston-xdg_surface_present,giucam/weston