wireless: fix a few sparse warnings

Signed-off-by: Johannes Berg <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

net/mac80211/rc80211_minstrel.c

···
 	return sample_ndx;
 }
 
-void
+static void
 minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
 		  void *priv_sta, struct ieee80211_tx_rate_control *txrc)
 {

net/mac80211/tx.c

···
 	left = payload_len - per_fragm;
 	for (i = 0; i < num_fragm - 1; i++) {
 		struct ieee80211_hdr *fhdr;
-		struct ieee80211_tx_info *info;
 		size_t copylen;
 
 		if (left <= 0)

net/wireless/reg.c

···
 	print_rd_rules(rd);
 }
 
-void print_regdomain_info(const struct ieee80211_regdomain *rd)
+static void print_regdomain_info(const struct ieee80211_regdomain *rd)
 {
 	printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
 		rd->alpha2[0], rd->alpha2[1]);