ARM: dts: bcm47094: Add devicetree for D-Link DIR-890L

This adds a device tree for the D-Link DIR-890L. This device
is very similar to D-Link DIR-885L, the differences are detailed
as a comment in the DTS file.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221107134104.1422169-2-linus.walleij@linaro.org


Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>