drivers: usb: Fix trivial spelling

The word 'descriptor' is misspelled throughout the tree.

Fix it up accordingly:
    decriptors -> descriptors
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20200609124610.3445662-8-kieran.bingham+renesas@ideasonboard.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/core/of.c

@@ -45,7 +45,7 @@ EXPORT_SYMBOL_GPL(usb_of_get_device_node);
  *
  * Determine whether a USB device has a so called combined node which is
  * shared with its sole interface. This is the case if and only if the device
- * has a node and its decriptors report the following:
+ * has a node and its descriptors report the following:
  *
  *	1) bDeviceClass is 0 or 9, and
  *	2) bNumConfigurations is 1, and