Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index e63efeb..65f78ca 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -623,7 +623,7 @@
  * USB hubs.  That makes it stay the same until systems are physically
  * reconfigured, by re-cabling a tree of USB devices or by moving USB host
  * controllers.  Adding and removing devices, including virtual root hubs
- * in host controller driver modules, does not change these path identifers;
+ * in host controller driver modules, does not change these path identifiers;
  * neither does rebooting or re-enumerating.  These are more useful identifiers
  * than changeable ("unstable") ones like bus numbers or device addresses.
  *
@@ -793,7 +793,7 @@
  *	usb_set_intfdata() to associate driver-specific data with the
  *	interface.  It may also use usb_set_interface() to specify the
  *	appropriate altsetting.  If unwilling to manage the interface,
- *	return -ENODEV, if genuine IO errors occured, an appropriate
+ *	return -ENODEV, if genuine IO errors occurred, an appropriate
  *	negative errno value.
  * @disconnect: Called when the interface is no longer accessible, usually
  *	because its device has been (or is being) disconnected or the