trivial endianness annotations in drivers/usb (apply after ohci and isd200
fixes).

Note: drivers/usb is nearly endian-clean at that point; there are several
very dubious places in there (in particular, rtl8150, pegasus and usbnet
are almost certainly broken in mii-related code on big-endian hosts); I'm
leaving them alone for now.
Signed-off-by: Al Viro <viro@parcelfarce.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>