net: wireless: Cypress: Remove BCMDHD_WEXT

CVE-2017-0509

Google found one security issue in wl_iw.c where these WIRELESS EXTENSION APIs
obsoleted and no longer used. So these files should be removed completely from
mogrification.

Change-Id: I03d59fa9780695efd5a7411485841a52595d45eb

drivers/net/wireless/bcmdhd/Kconfig

@@ -53,14 +53,6 @@ config BCMDHD_MURATA_NVRAM_PATH
         ---help---
           Path to the murata calibration file.
 
-config BCMDHD_WEXT
-	bool "Enable WEXT support"
-	depends on BCMDHD && CFG80211 = n
-	select WIRELESS_EXT
-	select WEXT_PRIV
-	help
-	  Enables WEXT support
-
 config DHD_USE_STATIC_BUF
 	bool "Enable memory preallocation"
 	depends on BCMDHD