Some devices compatibles with the WS2812 IC have a different channel to
color mappings (e.g. RGB, BGR, RGBW, etc).
This patch introduces the "color-mapping" required property for the
WS2812 DT binding and adds support to the ws2812_gpio and ws2812_spi
drivers. This new property allows to configure the color to channel
mapping of a WS2812 compatible LED strip controller from its DT node.
Since this property also allows to know if a white channel is available,
then this patch removes the "has-white-channel" property.
Signed-off-by: Simon Guinot <simon.guinot@seagate.com>
Simon Guinot