[EFL] Rename ENABLE_REGIONS to ENABLE_CSS_REGIONS
https://bugs.webkit.org/show_bug.cgi?id=110699

Patch by Laszlo Gombos <l.gombos@samsung.com> on 2013-02-24
Reviewed by Andreas Kling.

Fix a typo. ENABLE_REGIONS is called ENABLE_CSS_REGIONS
throughout the project.

* Source/cmake/OptionsEfl.cmake:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143879 268f45cc-cd09-0410-ab3c-d52691b4dbfc