dt-bindings: mmc: samsung,exynos-dw-mshc: add specific compatible for exynos8895

Add samsung,exynos8895-dw-mshc-smu specific compatible to the bindings
documentation. Since Samsung, as usual, likes reusing devices from older
designs, use the samsung,exynos7-dw-mshc-smu compatible.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/all/20250105161344.420749-2-ivo.ivanov.ivanov1@gmail.com/


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>