regulator: rtq6752: Refine binding document

Drop regulators property reference and remove the status in example dts.
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1626229532-13037-1-git-send-email-u0084500@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/richtek,rtq6752-regulator.yaml

@@ -30,7 +30,6 @@ properties:
 
   regulators:
     type: object
-    $ref: regulator.yaml#
 
     patternProperties:
       "^(p|n)avdd$":
@@ -56,7 +55,6 @@ examples:
 
       rtq6752@6b {
         compatible = "richtek,rtq6752";
-        status = "okay";
         reg = <0x6b>;
         enable-gpios = <&gpio26 2 0>;