staging:rtl8187se:ieee80211: Fix incorrect type in assignment

This patch fixes sparse warnings like :
(1) drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:331:31:
warning:
incorrect type in assignment (different base types)
drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:331:31:
expected unsigned short [unsigned] [usertype] frame_ctl
drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:331:31: got
restricted __le16 [usertype] <noident>

(2) drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:1091:32:
warning: incorrect type in assignment (different base types)
drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:1091:32:
expected restricted __le16 [usertype] duration_id
drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:1091:32: got
int

Signed-off-by: Himangi Saraogi <[e-mail]>
Acked-by: Paul E. McKenney <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8187se/ieee80211/ieee80211.h

···
 };
 
 struct ieee80211_header_data {
-	u16 frame_ctl;
+	__le16 frame_ctl;
 	u16 duration_id;
 	u8 addr1[6];
 	u8 addr2[6];