ipw2x00: correct Kconfig to prevent following entries from not indenting

not defining dependencies for LIBIPW caused the following entries to not be
indented. changing this entry to depend on PCI && WLAN_80211 corrects this
issue

Signed-off-by: Jay Sternberg <jay.e.sternberg@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2x00/Kconfig

@@ -150,6 +150,7 @@ config IPW2200_DEBUG
 
 config LIBIPW
 	tristate
+	depends on PCI && WLAN_80211
 	select WIRELESS_EXT
 	select CRYPTO
 	select CRYPTO_ARC4