elput: Return touch coordinates when we have no pointer

elput: Return touch coordinates when we have no pointer

If a user calls elput_input_pointer_xy_get (as is done via
ecore_evas_drm) and a pointer does not exist, we never return any
coordinates for this function.

Enlightenment is using ecore_evas_pointer_xy_get (which when using the
drm ee, ends up calling elput_input_pointer_xy_get). If we have no
pointer device, then no coordinates are ever returned and touch
clicking does not function properly.

To fix that we will check if a touch device exists and supply the
coordinates from that (in the case where there is no pointer device).

@fix

Signed-off-by: Chris Michael <cp.michael@samsung.com>