Based on pending device tree support in the LP55xx drivers
we can add the correct LED and channel configuration from the
ux500 device tree for all HREF variants.

Cc: Bryan Wu <cooloney@gmail.com>
Acked-by: Milo Kim <Milo.Kim@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>