brcm80211: move under broadcom vendor directory

Part of reorganising wireless drivers directory and Kconfig. Note that I had to
edit Makefiles from subdirectories to use the new location.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/Kconfig

@@ -159,7 +159,6 @@ config MWL8K
 	  will be called mwl8k.  If unsure, say N.
 
 source "drivers/net/wireless/ath/Kconfig"
-source "drivers/net/wireless/brcm80211/Kconfig"
 source "drivers/net/wireless/hostap/Kconfig"
 source "drivers/net/wireless/ipw2x00/Kconfig"
 source "drivers/net/wireless/iwlwifi/Kconfig"