Agilex support for AD9081

[bluncan]

PR Description

Adds support for JESD204B on Agilex 7 (DK-SI-AGI027FA) and the reference design project for AD9081.

Tested on hardware with 8 lanes, 8 converters and a lane rate of 15 GHz.

User guide: https://wiki.analog.com/resources/eval/user-guides/ad9081/quickstart/fm87

PR Type

• [ ] Bug fix (change that fixes an issue)
• [x] New feature (change that adds new functionality)
• [ ] Breaking change (has dependencies in other repos or will cause CI to fail)

PR Checklist

• [x] I have followed the code style guidelines
• [x] I have performed a self-review of changes
• [x] I have compiled all hdl projects and libraries affected by this PR
• [x] I have tested in hardware affected projects, at least on relevant boards
• [x] I have commented my code, at least hard-to-understand parts
• [x] I have signed off all commits from this PR
• [x] I have updated the documentation (wiki pages, ReadMe files, Copyright etc)
• [x] I have not introduced new Warnings/Critical Warnings on compilation
• [ ] I have added new hdl testbenches or updated existing ones