v1-r: Add FP4

Description

v1-r: Add FP4

Issue(s)

https://gitlab.e.foundation/e/backlog/-/issues/3628

Test environment

• Already verified with https://gitlab.e.foundation/e/priv/os/build/-/merge_requests/159#test-environment

Test procedures

• Already verified with https://gitlab.e.foundation/e/priv/os/build/-/merge_requests/159#test-procedures
• Pipeline: https://gitlab.e.foundation/e/priv/os/build/-/pipelines/152354

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation