ar71xx: allow to override fw version in CameoHornet profile

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

git-svn-id: svn://svn.openwrt.org/openwrt@36784 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: allow to build CameoHornet images for multiple regions

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

git-svn-id: svn://svn.openwrt.org/openwrt@36785 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add profile and build image for the DIR-601-B1

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

git-svn-id: svn://svn.openwrt.org/openwrt@36786 3c298f89-4303-0410-b956-a3cf2f4a3e73