APN type fix for Telenor Serbia

APN type was set to "default,supl,mms" for both internet and mms. Using CyanogenMod (CM11) it is causing of sending and receiving mms to get stuck forever.

This sets APN type for internet to "default,supl" and "mms" for mms.

Change-Id: Ia2cede31788ab4f76b52d8a2f2ef8a934427169e
(cherry picked from commit 3e60817b18988da0fcda623e197511c169b820c4)
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
(cherry picked from commit a4bce35b530e5ee53cf01d6de4ec5fdcaf6808a1)