iwlwifi: move under intel vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/intel/Kconfig b/drivers/net/wireless/intel/Kconfig
index 0a7cd61..5b14f2f 100644
--- a/drivers/net/wireless/intel/Kconfig
+++ b/drivers/net/wireless/intel/Kconfig
@@ -13,5 +13,6 @@
 
 source "drivers/net/wireless/intel/ipw2x00/Kconfig"
 source "drivers/net/wireless/intel/iwlegacy/Kconfig"
+source "drivers/net/wireless/intel/iwlwifi/Kconfig"
 
 endif # WLAN_VENDOR_INTEL