dt-bindings: arm: samsung: document Klimt WiFi board binding

Add binding for Galaxy Tab S 8.4", based on Exynos 5420 with codename
klimt-wifi.
Signed-off-by: NHenrik Grimler <henrik@grimler.se>
Link: https://lore.kernel.org/r/20220124131241.29946-2-henrik@grimler.seSigned-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml

@@ -141,6 +141,7 @@ properties:
           - enum:
               - insignal,arndale-octa           # Insignal Arndale Octa
               - samsung,chagall-wifi            # Samsung SM-T800
+              - samsung,klimt-wifi              # Samsung SM-T700
               - samsung,smdk5420                # Samsung SMDK5420 eval
           - const: samsung,exynos5420
           - const: samsung,exynos5