Adjust code to use the slightly different Eo2 API.

With Eo2 you can return values directly without the need to use a pointer
(use the C return).

For example:
eo_do(obj, elm_object_text_get(&text));
becomes:
eo_do(obj, text = elm_object_text_get());

@feature

diff --cc src/lib/elm_cnp.c
Simple merge

diff --cc src/lib/elm_scroller.c
Simple merge

diff --cc src/lib/elm_video.c
Simple merge