evas : remove native.func.data variable and data argument of native calblacks.

evas : remove native.func.data variable and data argument of native calblacks.

Summary:
Evas Image should be independent of render engine.
So remove native.func.data member of RGBA_Image, Evas_GL_Image struct.
And remove data argument,too.

Test Plan: Local test, Tizen3.0 mobile, Desktop englitenment

Reviewers: jpeg, spacegrapher, wonsik

Subscribers: cedric, dkdk

Differential Revision: https://phab.enlightenment.org/D3850