Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h
index 6510f8e..19111c7 100644
--- a/net/mac80211/rc80211_pid.h
+++ b/net/mac80211/rc80211_pid.h
@@ -77,7 +77,7 @@
 };
 
 struct rc_pid_event {
-	/* The time when the event occured */
+	/* The time when the event occurred */
 	unsigned long timestamp;
 
 	/* Event ID number */