[FS#1479] ramips: sysupgrade and factory images built from master after 4.14 upgrade are not built due to size

[LEDE Bugs]

The following task has a new comment added:

FS#1479 - ramips: sysupgrade and factory images built from master after 4.14 upgrade are not built due to size
User who did this - Alex Maclean (eamaclean)

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Sorry to be slow in catching this. Please apply this patch: https://gist.github.com/eamaclean/41b97c42edf26726701867f46611dfd8

I'll get this upstream shortly. The stock layout is, as you can see, rather awkward - there's a huge amount of wasted space, but freeing it will prevent rolling back to stock firmware without a full flash backup, and possibly also require relocating the MAC address in flash.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1479#comment4647