Update ADRD8012-01Z support

[pamolloy]

• U-Boot support (a small dts) has been merged into https://github.com/analogdevicesinc/u-boot/commits/adi-u-boot-2025.10.y/
• @pamolloy Review who requested Blackduck scanning on U-Boot
• @alin724 create a documentation page in the Linux repo (see CI branch) on the current state of GMSL
• @alin724 will open a PR with any changes against main

[pamolloy]

@alin724 for the final image we can use our br2_external to define the SD card image layout (e.g. genimage.cfg), build U-Boot and the kernel, and fetch the system.top/FSBL, generate a boot.bin with bootgen and finally download the root filesystem. Basically this replaces ADI custom scripts and any manual steps. Then the images can be uploaded to Cloudsmith in a Github Workflow as we're doing with other projects.