trivial: fix typo "for for" in multiple files

trivial: fix typo "for for" in multiple files

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index a8fe05f..19fabc4 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1071,7 +1071,7 @@
  * @start_frame: Returns the initial frame for isochronous transfers.
  * @number_of_packets: Lists the number of ISO transfer buffers.
  * @interval: Specifies the polling interval for interrupt or isochronous
- *	transfers.  The units are frames (milliseconds) for for full and low
+ *	transfers.  The units are frames (milliseconds) for full and low
  *	speed devices, and microframes (1/8 millisecond) for highspeed ones.
  * @error_count: Returns the number of ISO transfers that reported errors.
  * @context: For use in completion functions.  This normally points to