usb: dwc3: Document nostream_work

JIRA: https://issues.redhat.com/browse/RHEL-78837

commit 1ed3af5
Author: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Tue, 21 Jan 2025 23:11:23 +0000

  Add missing description to the nostream_work of dwc3_ep. The work is
  used by bulk multi-stream endpoints for a NoStream event to reinitiate
  the stream if needed.

  Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
  Closes: https://lore.kernel.org/linux-next/20250120182219.30dcb3c6@canb.auug.org.au/
  Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
  Link: https://lore.kernel.org/r/7cdeaa346d24907712aac533c1c5f90a03151189.1737500936.git.Thinh.Nguyen@synopsys.com
  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Desnes Nunes <desnesn@redhat.com>

Author: Desnes Nunes

drivers/usb/dwc3/core.h

@@ -717,6 +717,7 @@ struct dwc3_event_buffer {
 /**
  * struct dwc3_ep - device side endpoint representation
  * @endpoint: usb endpoint
+ * @nostream_work: work for handling bulk NoStream
  * @cancelled_list: list of cancelled requests for this endpoint
  * @pending_list: list of pending requests for this endpoint
  * @started_list: list of started requests on this endpoint