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Add byteswapping.  Original version partially worked on PPC with Net2280,
this version applies to the latest RNDIS code but hasn't been retested on
big-endian.  Ping should be working in at least one one direction.

Also added a handful of other things from my BK:  track suspend/resume
(to eventually implement wake-on-lan), give a better rndis error
message, and add missing declarations for PM-related OIDs (usage is
#ifdeffed out by previous patch).

    From:	   Jon Neal <jon@ballardtech.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

This patch adds the RNDIS message engine and kbuild/kconfig
support for it.  This is currently labeled EXPERIMENTAL.

Patch contributed by Robert Schwebel, and developed with
support from Auerswald GmbH.