WIP Add support for building with Kas.

[ajlennon]

Description

Make build easier by using Kas configuration for setup (instead of repo and scripting)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Build and Run image on Beagleboard V Fire

Test Configuration:

• Reference design release:
• Hardware: BeagleBoard V Fire (tested, but should be useful by all supported boards)
• HSS version: ?
• Bare metal examples version: N/A
• Buildroot / Yocto release: Kirkstone

Checklist:

• I have reviewed my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have tested that my fix is effective or that my feature works
• I have added a maintainers file for any new board support (N/A)

[ajlennon]

Hi @vfalanis I wonder if I could bounce this PR off you?

I have Kas building an image now which makes life simpler and I like.

However I was having a lot of trouble with an error building a WIC image and it appears I've fixed this by removing the size setting from the WKS file

see 8b91962#diff-6821332b6b6b366e589add9d87fc16ed7c2365669b396a6c5aebd6b53a96c75d

I wonder if you could comment on whether what I've done seems right here?

Thanks! Alex