staging: wlan-ng: avoid new typedef: p80211item_t

This patch fixes the following checkpatch.pl warning in p80211types.h:
WARNING: do not add new typedefs

It applies for typedef p80211item_t
Signed-off-by: NSergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/p80211types.h

@@ -255,11 +255,11 @@ struct p80211macarray {
 } __packed;
 
 /* prototype template */
-typedef struct p80211item {
+struct p80211item {
 	u32 did;
 	u16 status;
 	u16 len;
-} __packed p80211item_t;
+} __packed;
 
 /* prototype template w/ data item */
 typedef struct p80211itemd {