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>
diff --git a/drivers/net/wireless/ipw2x00/Kconfig b/drivers/net/wireless/ipw2x00/Kconfig
index 3d5cc44..1d5dc3e 100644
--- a/drivers/net/wireless/ipw2x00/Kconfig
+++ b/drivers/net/wireless/ipw2x00/Kconfig
@@ -150,6 +150,7 @@
 
 config LIBIPW
 	tristate
+	depends on PCI && WLAN_80211
 	select WIRELESS_EXT
 	select CRYPTO
 	select CRYPTO_ARC4