UVC missing VC_PROCESSING_UNIT

[korneliuszo]

Related area

UVC

Hardware specification

rp2040

Is your feature request related to a problem?

UVC example misses VC_PROCESSING_UNIT which is needed for controlling things like brightness.

Describe the solution you'd like

I want to get callback when user changes brightness from webcam program.

I have checked existing issues, dicussion and documentation

• I confirm I have checked existing issues, dicussion and documentation.