[PATCH -next] wlwifi: mei: Fix build error without CFG80211

[YueHaibing]

If CFG80211 is n and IWLMEI is y,  building fails:

drivers/net/wireless/intel/iwlwifi/mei/net.o: In function `iwl_mei_tx_copy_to_csme':
net.c:(.text+0xd0): undefined reference to `ieee80211_hdrlen'

Make IWLMEI depends on CFG80211 to fix this.

Fixes: 2da4366f9e2c ("iwlwifi: mei: add the driver to allow cooperation with CSME")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/net/wireless/intel/iwlwifi/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/Kconfig b/drivers/net/wireless/intel/iwlwifi/Kconfig
index 85e704283755..8c003cd29ab7 100644
--- a/drivers/net/wireless/intel/iwlwifi/Kconfig
+++ b/drivers/net/wireless/intel/iwlwifi/Kconfig
@@ -137,7 +137,7 @@ endif
 
 config IWLMEI
 	tristate "Intel Management Engine communication over WLAN"
-	depends on INTEL_MEI
+	depends on INTEL_MEI && CFG80211
 	depends on PM
 	help
 	  Enables the iwlmei kernel module.
-- 
2.17.1