[PATCH] nbd: endian annotations

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Paul Clements <Paul.Clements@steeleye.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>