staging: kpc2000: fix up build problems with readq()

The 0-day system found a bunch of warnings for when readq() is not
defined on the platform, so fix this by including the
linux/io-64-nonatomic-lo-hi.h file which will fix up these issues.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>