ipw2200: fix kconfig dependencies

Fix kconfig dependencies for ipw2x00 drivers, fixes build errors:

ERROR: "wiphy_free" [drivers/net/wireless/ipw2x00/libipw.ko] undefined!
ERROR: "wiphy_unregister" [drivers/net/wireless/ipw2x00/libipw.ko] undefined!
ERROR: "wiphy_new" [drivers/net/wireless/ipw2x00/libipw.ko] undefined!
ERROR: "cfg80211_wext_giwname" [drivers/net/wireless/ipw2x00/ipw2200.ko] undefined!
ERROR: "wiphy_register" [drivers/net/wireless/ipw2x00/ipw2200.ko] undefined!
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2x00/Kconfig

@@ -4,7 +4,7 @@
 
 config IPW2100
 	tristate "Intel PRO/Wireless 2100 Network Connection"
-	depends on PCI && WLAN_80211
+	depends on PCI && WLAN_80211 && CFG80211
 	select WIRELESS_EXT
 	select FW_LOADER
 	select LIB80211
@@ -63,7 +63,7 @@ config IPW2100_DEBUG
 
 config IPW2200
 	tristate "Intel PRO/Wireless 2200BG and 2915ABG Network Connection"
-	depends on PCI && WLAN_80211
+	depends on PCI && WLAN_80211 && CFG80211
 	select WIRELESS_EXT
 	select FW_LOADER
 	select LIB80211
@@ -150,7 +150,7 @@ config IPW2200_DEBUG
 
 config LIBIPW
 	tristate
-	depends on PCI && WLAN_80211
+	depends on PCI && WLAN_80211 && CFG80211
 	select WIRELESS_EXT
 	select CRYPTO
 	select CRYPTO_ARC4