This commit integrates optee-client support from the meta-st-openstlinux layer, based on the openstlinux-6.6-yocto-scarthgap-mpu-v25.03.19 tag. https://onedigi.atlassian.net/browse/DEL-9442 Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>