usb-storage: switch trace events

Replace most DPRINTF macros with trace events.
Drop some DPRINTF macros.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20201105134112.25119-2-kraxel@redhat.com
2 files changed