staging: rtl8192u: ieee80211: Fix sparse endianness warnings

Fix the following sparse warnings:

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32: warning: incorrect type in assignment (different base types)
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32:    expected restricted __le16 [usertype] frame_ctl
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32:    got int
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50: warning: invalid assignment: |=
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50:    left side has type restricted __le16
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50:    right side has type int
Signed-off-by: NGaston Gonzalez <gascoar@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c

@@ -660,8 +660,11 @@ inline struct sk_buff *ieee80211_authentication_req(struct ieee80211_network *be
 	auth = (struct ieee80211_authentication *)
 		skb_put(skb, sizeof(struct ieee80211_authentication));
 
-	auth->header.frame_ctl = IEEE80211_STYPE_AUTH;
-	if (challengelen) auth->header.frame_ctl |= IEEE80211_FCTL_WEP;
+	if (challengelen)
+		auth->header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_AUTH
+				| IEEE80211_FCTL_WEP);
+	else
+		auth->header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_AUTH);
 
 	auth->header.duration_id = 0x013a; //FIXME