Staging: wlan-ng: Add select WEXT_PRIV to Kconfig to prevent build failure

Without WEXT_PRIV set the p80211wext.c fails to build due to unknown fields in
the iw_handler_def struct.
Those fields are enclosed in WEXT_PRIV conditionals in the prototype
of iw_handler_def in include/net/iw_handler.h

Signed-off-by: Peter Huewe <[e-mail]>
Acked-by: Simon Horman <[e-mail]>
Cc: stable <[e-mail]> [2.6.33 only]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/wlan-ng/Kconfig

···
 	tristate "Prism2.5/3 USB driver"
 	depends on WLAN && USB
 	select WIRELESS_EXT
+	select WEXT_PRIV
 	default n
 	---help---
 	  This is the wlan-ng prism 2.5/3 USB driver for a wide range of