dt-bindings: pinctrl: samsung: Add compatible for exynos9810-wakeup-eint

Add the compatible for Samsung Exynos9810 pinctrl eint block
to the schema. It is compatible with Exynos850 EINT controller,
and doesn't have a dedicated IRQ line.

Co-developed-by: Maksym Holovach <nergzd@nergzd723.xyz>
Signed-off-by: Maksym Holovach <nergzd@nergzd723.xyz>
Signed-off-by: Markuss Broks <markuss.broks@gmail.com>
Link: https://lore.kernel.org/r/20241026-exynos9810-v3-4-b89de9441ea8@gmail.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>