dt-bindings: pinctrl: samsung: Add exynos990-wakeup-eint compatible

Add a dedicated compatible for the exynos990-wakeup-eint node.
This SoC pin controller does not mux interrupts. It's compatible with
Exynos 850's node, while also being compatible with the Exynos7
fallback.

Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
Link: https://lore.kernel.org/r/20241016154838.64515-3-igor.belwon@mentallysanemainliners.org


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