Timeout if an ASL or PZL update doesn't not complete and reset the
hardware.
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>

Add asl, pzl and di debugfs files to uwb/uwbN/wusbhc for WHCI host
controller.  These dump the current ASL, PZL and DI buffer.
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>

ASL/PZL updates while the WUSB channel is inactive (i.e., the PZL and
ASL are stopped) may not complete.  This causes hangs when removing the
whci-hcd module if a device is still connected (removing the device
does an endpoint_disable which results in an ASL update to remove the
qset).

If the WUSB channel is inactive the update can simply be skipped as the
WHC doesn't care about the state of the ASL/PZL.
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>

A driver for Wireless USB host controllers that comply with the
Wireless Host Controller Interface (HCI) specification as published by
Intel.

The latest publically available version of the specification (0.95) is
supported (except for isochronous transfers).

Build fixes by Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>