mac80211: make rc_pid_fop_events static

No need to not be.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac80211/rc80211_pid_debugfs.c

@@ -197,7 +197,7 @@ static ssize_t rate_control_pid_events_read(struct file *file, char __user *buf,
 
 #undef RC_PID_PRINT_BUF_SIZE
 
-struct file_operations rc_pid_fop_events = {
+static struct file_operations rc_pid_fop_events = {
 	.owner = THIS_MODULE,
 	.read = rate_control_pid_events_read,
 	.poll = rate_control_pid_events_poll,