It is for Mikrotik devices only, rename the subtarget
to reflect that. Also fix the wget2nand script to use
the new image names.
Based on the patch by Stefan Agner:
http://patchwork.openwrt.org/patch/4123/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 38509
