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05d35403b2
This enables using 4kiB sectors as erase blocks for 4MiB NOR flash ICs that support it. Writeable jffs2 overlay used to store settings requires a partition with at least 5 erase blocks, so using small sectors is essential for devices with 4MiB flash. Sysupgrading a device running firmware without this feature will likely not allow to preserve configs automatically but since ath79 is considered to be in a "technology preview" state it shouldn't be a problem. Signed-off-by: Paul Fertser <fercerpav@gmail.com>