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This patch is a follow on to https://lkml.org/lkml/2011/3/21/239, which
was merged as commit 51a63e67

.

This patch adds support for S3, as pointed out by Chris Wright.
Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>