mac80211: minstrel[_ht]: remove non-ascii debugfs characters

Replace the average symbol by "avg" to avoid being warned about the
non-ASCII symbol all the time, line up the columns properly.

(I changed my mind - the warnings are getting annoying)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/rc80211_minstrel_debugfs.c

@@ -85,12 +85,10 @@ minstrel_stats_open(struct inode *inode, struct file *file)
 	file->private_data = ms;
 	p = ms->buf;
 	p += sprintf(p, "\n");
-	p += sprintf(p, "best   __________rate_________    ______"
-			"statistics______    ________last_______    "
-			"______sum-of________\n");
-	p += sprintf(p, "rate  [name idx airtime max_tp]  [ ø(tp) ø(prob) "
-			"sd(prob)]  [prob.|retry|suc|att]  "
-			"[#success | #attempts]\n");
+	p += sprintf(p,
+		     "best   __________rate_________    ________statistics________    ________last_______    ______sum-of________\n");
+	p += sprintf(p,
+		     "rate  [name idx airtime max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
 
 	for (i = 0; i < mi->n_rates; i++) {
 		struct minstrel_rate *mr = &mi->r[i];

net/mac80211/rc80211_minstrel_ht_debugfs.c

@@ -129,12 +129,10 @@ minstrel_ht_stats_open(struct inode *inode, struct file *file)
 	p = ms->buf;
 
 	p += sprintf(p, "\n");
-	p += sprintf(p, "              best   ____________rate__________    "
-			"______statistics______    ________last_______    "
-			"______sum-of________\n");
-	p += sprintf(p, "mode guard #  rate  [name   idx airtime  max_tp]  "
-			"[ ø(tp) ø(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | "
-			"#attempts]\n");
+	p += sprintf(p,
+		     "              best   ____________rate__________    ________statistics________    ________last_______    ______sum-of________\n");
+	p += sprintf(p,
+		     "mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
 
 	p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
 	for (i = 0; i < MINSTREL_CCK_GROUP; i++)