Revert "Added telenor 'smart' ipv4v6 apn"

This reverts commit 8dcc83a3.

Revert "Migrate Telenor Norway APN to IPV6"

This reverts commit 2f9f33b6.

 * IPv6 tethering is partially broken in CM11, and IPv6 only APN
   is not working on older devices, so revert back to IPv4 only APN.

Change-Id: I89ec93e949886fec297132c2ec70a46fa69862a1