regulator: dt-bindings: qcom,rpmh: document h and k ID

Document used PMIC IDs: 'h' (sm8450-hdk, sm8450-qrd) and 'k'
(sc7280-crd).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220411105903.230733-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: krzk

Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml

@@ -78,7 +78,7 @@ properties:
         RPMh resource name suffix used for the regulators found
         on this PMIC.
     $ref: /schemas/types.yaml#/definitions/string
-    enum: [a, b, c, d, e, f]
+    enum: [a, b, c, d, e, f, h, k]
 
   qcom,always-wait-for-ack:
     description: |