Fix spelling of "occurred".

Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/gadget/mpc8xx_udc.c b/drivers/usb/gadget/mpc8xx_udc.c
index b3e178a..ad5ea7a 100644
--- a/drivers/usb/gadget/mpc8xx_udc.c
+++ b/drivers/usb/gadget/mpc8xx_udc.c
@@ -170,7 +170,7 @@
 
 /* udc_irq
  *
- * Poll for whatever events may have occured
+ * Poll for whatever events may have occurred
  */
 void udc_irq (void)
 {