net: remove obsolete simple_strto<foo>

This patch replace the obsolete simple_strto<foo> with kstrto<foo>

Signed-off-by: Abhijit Pawar <abhi.c.pawar@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac80211/debugfs_sta.c

@@ -221,6 +221,9 @@ static ssize_t sta_agg_status_write(struct file *file, const char __user *userbu
 		return -EINVAL;
 
 	tid = simple_strtoul(buf, NULL, 0);
+	ret = kstrtoul(buf, 0, &tid);
+	if (ret)
+		return ret;
 
 	if (tid >= IEEE80211_NUM_TIDS)
 		return -EINVAL;