[PATCH] usb-storage: get rid of the timer during URB submission

This patch uses completion timeout instead of a timer to implement
a timeout when submitting an URB.

It also put the task in interruptible state instead of an
uninterruptible one while waiting for the completion.

Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>