We should be more careful and don't generate 128K JFFS2 images for
devices with flashes using 64K blocks (nor the other way).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40762 3c298f89-4303-0410-b956-a3cf2f4a3e73