dt-bindings: crypto: slimsss: Correct a typo in compatible

Correct a typo in the compatible - missing trailing 's'.
Reviewed-by: Kamil Konieczny <k.konieczny@samsung.com>
Acked-by: Kamil Konieczny <k.konieczny@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200903180400.2865-1-krzk@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/crypto/samsung-slimsss.yaml

@@ -19,7 +19,7 @@ description: |+
 properties:
   compatible:
     items:
-      - const: samsung,exynos5433-slim-ss
+      - const: samsung,exynos5433-slim-sss
 
   reg:
     maxItems: 1