This is now controlled by a module parameter and the default
configuration depends on brcmsmac being installed.
This patch causes b43 to take core rev 17 and 18 always by default.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37307 3c298f89-4303-0410-b956-a3cf2f4a3e73