Convert CONFIG_CMD_DEKBLOB to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_DEKBLOB

Note: This option does not seem to actually be enabled by any board.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: imply under SECURE_BOOT for mx5/6/7]
Signed-off-by: Tom Rini <trini@konsulko.com>
4 files changed