ar71xx: image: remove too big files in the CatFiles macro

Also improve the warning message.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38125 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: image: add optional JFFS2 padding support to the CatFiles macro

Also remove the similar code from the Netgear
profile and use the new feature instead.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38126 3c298f89-4303-0410-b956-a3cf2f4a3e73