regulator: qcom: Document PM8226 smd regulator

Document the PM8226 SMD-RPM regulator entry.
Signed-off-by: Bartosz Dudziak <bartosz.dudziak@snejp.pl>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210502115304.8570-1-bartosz.dudziak@snejp.plSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.yaml

@@ -24,6 +24,10 @@ description:
 
   For mp5496, s2
 
+  For pm8226, s1, s2, s3, s4, s5, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10,
+  l11, l12, l13, l14, l15, l16, l17, l18, l19, l20, l21, l22, l23, l24, l25,
+  l26, l27, l28, lvs1
+
   For pm8841, s1, s2, s3, s4, s5, s6, s7, s8
 
   For pm8916, s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
@@ -68,6 +72,7 @@ properties:
   compatible:
     enum:
       - qcom,rpm-mp5496-regulators
+      - qcom,rpm-pm8226-regulators
       - qcom,rpm-pm8841-regulators
       - qcom,rpm-pm8916-regulators
       - qcom,rpm-pm8941-regulators