nanopi-r6s: mark as supported

[efectn]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

GitHub issue reference:
Jira reference number [AR-9999]

Documentation summary for feature / change

Please delete this section if entry to main documentation is not needed.

If documentation entry is predicted, please provide key elements for further implementation into main documentation and set label to "Needs Documentation". You are welcome to open a PR to documentation or you can leave following information for technical writer:

• short description (copy / paste of PR title)
• summary (description relevant for end users)
• example of usage (how to see this in function)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• Test A
• Test B

Checklist:

Please delete options that are not relevant.

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules