This patch changes the UHCI driver's bus-release routine; now it will
correctly finish all pending but not-yet-completed URBs.  This fixes a
reported bug, when trying to rmmod uhci-hcd while using a USB mouse under
X.  Also, the patch changes a variable name from ...hs... to ...fs...
("high speed" -> "full speed") -- something I accidentally omitted in an
earlier patch.