configs: khadas-vim3(l): enable Function button support

Add options required to check the 'Function' button state.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2 files changed