Host side suspend/resume updates:

 - Add the missing "bus-wide" suspend/resume calls, which in this case
   leave everything up to the root port suspend code.

 - Scrub out state more completely on disconnect

 - Remote wakeup IRQ handling (untested because of enumeration issues)

Also:

 - Handle a host side oops if DMA is disabled as a module parameter

 - Minor cleanups of unused symbols

 - Update version string

And some very minor, related, peripheral side fixes.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>