Resize of ath79 / ZyXEL NBG6716 kernel partition

[Andre Valentin]

Hi!

The NBG6716 has recently been disabled because of size problems with the kernel partition.
I'm thinking about extending it to 8MB, shouldn't be a problem.

But I'm afraid users will brick their device when doing a sysupgrade to the new flash layout.
First time / in upgrade case it must be installed via manufacturer webif or via bootloader.

What do you propose in these cases?

Kind regards,

André