Backport of r46236 to CC : add support for the Bitmain Antminer S3
Signed-off-by: L. D. Pinney <ldpinney@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46445 3c298f89-4303-0410-b956-a3cf2f4a3e73