x86, uv: Update UV arch to target Legacy VGA I/O correctly.
Add function to direct Legacy VGA I/O traffic to correct I/O Hub. Signed-off-by: NMike Travis <travis@sgi.com> LKML-Reference: <201002022238.o12McEbi018727@imap1.linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Robin Holt <holt@sgi.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: David Airlie <airlied@linux.ie> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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