CONFIG_SECURE_BOOT is too generic and forbids to use it for cross
architecture purposes. If Secure Boot is required for imx, this means to
enable and use the HAB processor in the soc.
Signed-off-by: Stefano Babic <sbabic@denx.de>
All guides are currently located at doc/imx/habv4/guides/ directory.
Move encrypted_boot.txt document to guides directory.
Signed-off-by: Breno Lima <breno.lima@nxp.com>