spn: add override for Korea

This removes duplicated entry for SKTELECOM

Before	- https://www.dropbox.com/s/0kz0go9yruzppsl/Screenshot_2014-08-05-14-23-37.png
After	- https://www.dropbox.com/s/etmomqysq7l8wh9/Screenshot_2014-08-05-14-25-51.png

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

Change-Id: I2176cd88da0b8580e3d31a986f1a2a67581e679c