ectool: add write support

Use `ectool -w <addr> -z <data>` to write into ec ram

Change-Id: Id4aca045f6b7c2343be96ea474ee74033897b8b7
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: http://review.coreboot.org/8323
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Peter Stuge <peter@stuge.se>
1 file changed