dt-bindings: soc: samsung: exynos-pmu: add Exynos4212 compatible

Support for the Exynos4212 SoC was originally dropped as there were
no boards using it. We will be adding a device that uses it, so add
back the relevant compatible.

This reverts part of commit c406101 ("soc: samsung: Remove
Exynos4212 related dead code").

Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Link: https://lore.kernel.org/r/20230501195525.6268-2-aweber.kernel@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: refractionware

Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml

@@ -17,6 +17,7 @@ select:
         enum:
           - samsung,exynos3250-pmu
           - samsung,exynos4210-pmu
+          - samsung,exynos4212-pmu
           - samsung,exynos4412-pmu
           - samsung,exynos5250-pmu
           - samsung,exynos5260-pmu
@@ -36,6 +37,7 @@ properties:
           - enum:
               - samsung,exynos3250-pmu
               - samsung,exynos4210-pmu
+              - samsung,exynos4212-pmu
               - samsung,exynos4412-pmu
               - samsung,exynos5250-pmu
               - samsung,exynos5260-pmu
@@ -50,6 +52,7 @@ properties:
           - enum:
               - samsung,exynos3250-pmu
               - samsung,exynos4210-pmu
+              - samsung,exynos4212-pmu
               - samsung,exynos4412-pmu
               - samsung,exynos5250-pmu
               - samsung,exynos5420-pmu
@@ -125,6 +128,7 @@ allOf:
             enum:
               - samsung,exynos3250-pmu
               - samsung,exynos4210-pmu
+              - samsung,exynos4212-pmu
               - samsung,exynos4412-pmu
               - samsung,exynos5250-pmu
               - samsung,exynos5410-pmu
@@ -143,6 +147,7 @@ allOf:
             enum:
               - samsung,exynos3250-pmu
               - samsung,exynos4210-pmu
+              - samsung,exynos4212-pmu
               - samsung,exynos4412-pmu
               - samsung,exynos5250-pmu
               - samsung,exynos5420-pmu