This patch is from David Brownell.

UHCI root hub updates ... minor bugfixes and cleanups, improving
conformance with the USB hub specification.

 - UHCI doesn't support any kind of power switching; so modify the
   hub descriptor to stop claiming it does!  Likewise fail attempts
   to disable power on any port.

 - Intel defined both overcurrent status overcurrent-change bits, but
   the current code only knows about one.  Modify hub descriptor to
   report per-port overcurrent protection; and use both bits.

 - Modify the port status set/clear macros to know about the bits
   that must always be written as zero, and the write-to-clear bits.
   Update callers which wrote "set" instead of "clear".

 - Rewrote code returning port status; magic numbers are gone.

 - Driver can't really support 8 root hub ports; don't try.

Also moves the #define DEBUG earlier so that it can kick in any of
the various debug macros ... like pr_debug() and dev_dbg().