uboot-phytec

cros_ec: Fix issue with cros_ec_flash_write command

This commit fixes an issue where data is written to an
invalid memory location.
The issue has been introduced in commit
(88364387 cros: add cros_ec_driver)

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