0064-ramips-mtd-spi-nor-add-support-for-switching-between-3-byte-and-4-byte-addressing-on-w25q256-flash.patch

including backport of mtd patches.

The general flash issue (32MB) was discussed here:
https://gist.github.com/dmke/d389bc364b3f73f525076eaee0019dc1
The resulting patch was the following:
http://lists.infradead.org/pipermail/linux-mtd/2016-December/070889.html

Another patch by nbd168 added the required mtd read operations for supporting ZBT-WG3526-32M:
https://github.com/lede-project/source/commit/22d982e#diff-3835f027e16e6416090c1833bc732af3