[FS#1145] ar71xx/mikrotik: sysupgrade on rb-nor devices broken after 4k sectors re-enabled

[LEDE Bugs]

The following task has a new comment added:

FS#1145 - ar71xx/mikrotik: sysupgrade on rb-nor  devices broken after 4k sectors re-enabled
User who did this - Felix Fietkau (nbd)

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Please test my staging tree at https://git.lede-project.org/?p=lede/nbd/staging.git;a=summary
It should disable 4K sectors for large flash chips and only use them for smaller ones.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1145#comment3783