u-boot-amlogic-20210223

Neil Armstrong

@neil.armstrong

ceeb50b3 · button: add udevice forward declaration · Feb 23, 2021

- adds adc-keys button driver
- fix meson-saradc driver to get reference voltage
- add adc-keys test for sandbox
- enable adc-keys for VIM3 & VIM3L boards
- fix button.h build