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Detection was tested. Print status register before erase to help
debugging block locks.

Corresponding to flashrom svn r164 and coreboot v2 svn r3008.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Corey Osgood <corey.osgood@gmail.com>