dt-bindings: pinctrl: samsung: add exynos8890 compatible

Document the pinctrl compatible for the exynos8890 SoC. Let the
driver handle our clocks for pinctrl as well.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: ivoszbg

Documentation/devicetree/bindings/pinctrl/samsung,pinctrl.yaml

@@ -52,6 +52,7 @@ properties:
       - samsung,exynos7870-pinctrl
       - samsung,exynos7885-pinctrl
       - samsung,exynos850-pinctrl
+      - samsung,exynos8890-pinctrl
       - samsung,exynos8895-pinctrl
       - samsung,exynos9810-pinctrl
       - samsung,exynos990-pinctrl
@@ -133,7 +134,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: google,gs101-pinctrl
+            enum:
+              - google,gs101-pinctrl
+              - samsung,exynos8890-pinctrl
     then:
       required:
         - clocks