[EFL] Use C++ type cast instead of C style type cast

[EFL] Use C++ type cast instead of C style type cast
https://bugs.webkit.org/show_bug.cgi?id=68321

Reviewed by Martin Robinson.

This is a second step in order to be more compliant with WebKit coding style.
The second step is to change C-type casting with C++-type casting in .cpp files.

In addition, remained efl style '*' pointer placements are moved to the right place as well.

* ewk/ewk_auth_soup.cpp:
* ewk/ewk_contextmenu.cpp:
* ewk/ewk_frame.cpp:
* ewk/ewk_history.cpp:
* ewk/ewk_view.cpp:
* ewk/ewk_view_single.cpp:
* ewk/ewk_view_tiled.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96382 268f45cc-cd09-0410-ab3c-d52691b4dbfc