Appearently the kernel only uses kernel above it, so moving it to an
higher address causes a lot of unavailable memory (#19327).

Also move the on-flash kernel to 0x80a0000, as newer CFEs don't like
uncompressing there (net-booting an ELF kernel is fine, though).

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45164 3c298f89-4303-0410-b956-a3cf2f4a3e73