OpenWrt support for D-Link DIR-1960

It's built on the AP-MTKH7-0002 REV1.0 board
shared with the DIR-878 & DIR-882 but with 128M NAND Flash a bit like the DIR-853-A3
so it's won't be hard but someone who has one has to do it

https://github.com/garyttirn/openwrt/commit/ca95ece5f330c8e32f07009f93cf149bd77926cb