WLED is used for controlling the backlight on some boards, add the node
for it.
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211229170358.2457006-4-luca.weiss@fairphone.com