uboot-phytec

cros_ec: Add function to read back flash parameters

Add support for reading back flash parameters as reported by
the ec.

Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: u-boot@lists.denx.de
Acked-by: Simon Glass <sjg@chromium.org>