dt-bindings: samsung: pmu: document S5Pv210

Add compatible for the Samsung S5Pv210 SoC PMU.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200907161141.31034-2-krzk@kernel.org

Documentation/devicetree/bindings/arm/samsung/pmu.yaml

@@ -24,6 +24,7 @@ select:
           - samsung,exynos5420-pmu
           - samsung,exynos5433-pmu
           - samsung,exynos7-pmu
+          - samsung-s5pv210-pmu
   required:
     - compatible
 
@@ -40,6 +41,7 @@ properties:
           - samsung,exynos5420-pmu
           - samsung,exynos5433-pmu
           - samsung,exynos7-pmu
+          - samsung-s5pv210-pmu
       - const: syscon
 
   reg: