This adds "sparse -Wcontext" annotations to the main HCDs, reflecting that
they all need to drop their (schedule) lock while issuing URB completion
callbacks.  (Some completion callbacks will resubmit that URB, relying on
that to keep the endpoint queue from emptying and getting descheduled.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>