PR port-ia64/49717

Minimal changes needed to add nfs netboot support

FreeBSD RCS id tags.
Pointed out by Hubertf

Initial import of arch/ia64 sources.
These sources are ported from FreeBSD/ia64 code.
See individual source files for credits.
In addition, code from NetBSD/alpha NetBSD/sparc64,
NetBSD/i386 and NetB

Initial import of arch/ia64 sources.
These sources are ported from FreeBSD/ia64 code.
See individual source files for credits.
In addition, code from NetBSD/alpha NetBSD/sparc64,
NetBSD/i386 and NetBSD/amd64 were used as templates,
along with my own additions.

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