mac80211: shrink struct ieee80211_fragment_entry

Most of the fields in this struct use too wide types, change
that to shrink the struct from 64 to 48 bytes (on 64-bit.)

This results in a total saving of 64 bytes for each interface.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -84,13 +84,13 @@ struct ieee80211_local;
 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
 
 struct ieee80211_fragment_entry {
-	unsigned long first_frag_time;
-	unsigned int seq;
-	unsigned int rx_queue;
-	unsigned int last_frag;
-	unsigned int extra_len;
 	struct sk_buff_head skb_list;
-	int ccmp; /* Whether fragments were encrypted with CCMP */
+	unsigned long first_frag_time;
+	u16 seq;
+	u16 extra_len;
+	u16 last_frag;
+	u8 rx_queue;
+	bool ccmp; /* Whether fragments were encrypted with CCMP */
 	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
 };