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Based on http://patchwork.coreboot.org/patch/2881/

 but with 
the right pin (i.e. 16) according to Joshua Roys.

Corresponding to flashrom svn r1596.
Signed-off-by: Idwer Vollering <vidwer@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>