dt-bindings: arm: qcom: Document samsung,matisse-wifi device

Add binding documentation for Samsung Galaxy Tab 4 10.1 (2014) wifi
tablet which is based on Snapdragon 400 (apq8026) SoC.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220927214940.244480-3-matti.lehtimaki@gmail.com