padjffs2: add a different kind of padding (using standard jffs2 elements) to work around broken boot loaders for kernel partitions

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38804 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: use the new padjffs2 padding on Ubiquiti UAP-PRO to make the boot loader stop searching after the kernel partition

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38805 3c298f89-4303-0410-b956-a3cf2f4a3e73
ramips: use dd bs=4096k instead of bs=4M to make it more portable

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38806 3c298f89-4303-0410-b956-a3cf2f4a3e73