i915: fix AR register restore.
Make sure the restoration correctly restores the AR registers by flipping the ARX register into index mode before doing anything. Without this, some people have had the text mode restore all green. Signed-off-by: Jesse Barnes <jesse.barnes@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2f93d797
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