mac80211: brcmfmac: BRCMFMAC_USB was not set in config

Somehow BRCMFMAC_USB was not set in the build and brcmfmac.ko did not had usb support.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38332 3c298f89-4303-0410-b956-a3cf2f4a3e73