Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c
index f6b3c25..a03fbc1 100644
--- a/drivers/usb/c67x00/c67x00-sched.c
+++ b/drivers/usb/c67x00/c67x00-sched.c
@@ -907,7 +907,7 @@
 
 /* Remove all td's from the list which come
  * after last_td and are meant for the same pipe.
- * This is used when a short packet has occured */
+ * This is used when a short packet has occurred */
 static inline void c67x00_clear_pipe(struct c67x00_hcd *c67x00,
 				     struct c67x00_td *last_td)
 {