Add a check on the existence of the "temp-fitimg-loaded" environment
variable before setting it. It is needed, as with encrypted FIT images,
we need to decrypt them before accessing the boot script. In such cases,
u-boot sets that variable to "no" so the boot script does not override it,
and the FIT image is loaded again before the final boot to the OS.
https://onedigi.atlassian.net/browse/DEL-8945
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
3c26ef78e0