Mostly works except for USB led. Flashing not tested yet. Mostly
as an example for the sprom fixup code.

Fixup values taken from GPL tarball by comparing bcm43217_map.c
with the struct in sprom.c.

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41944 3c298f89-4303-0410-b956-a3cf2f4a3e73