cfg80211: fix MFP bug, sparse warnings

sparse warns about a number of things, and one of them
(use_mfp shadowed variable) actually is a bug, fix all
of them.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 2c33cd8..9d101d5 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -855,7 +855,7 @@
 	return 0;
 }
 
-int cfg80211_set_cipher_group(struct wireless_dev *wdev, u32 cipher)
+static int cfg80211_set_cipher_group(struct wireless_dev *wdev, u32 cipher)
 {
 	wdev->wext.connect.crypto.cipher_group = 0;
 
@@ -880,7 +880,7 @@
 	return 0;
 }
 
-int cfg80211_set_cipher_pairwise(struct wireless_dev *wdev, u32 cipher)
+static int cfg80211_set_cipher_pairwise(struct wireless_dev *wdev, u32 cipher)
 {
 	int nr_ciphers = 0;
 	u32 *ciphers_pairwise = wdev->wext.connect.crypto.ciphers_pairwise;
@@ -918,7 +918,7 @@
 }
 
 
-int cfg80211_set_key_mgt(struct wireless_dev *wdev, u32 key_mgt)
+static int cfg80211_set_key_mgt(struct wireless_dev *wdev, u32 key_mgt)
 {
 	int nr_akm_suites = 0;