regulator: dt-bindings: Revise the rt5190a buck/ldo description

Revise the rt5190a bucks and ldo property description.

Signed-off-by: ChiYuan Huang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml

···
         type: object
         $ref: regulator.yaml#
         description: |
-          regulator description for buck1 and buck4.
+          regulator description for buck1 to buck4, and ldo.
 
         properties:
           regulator-allowed-modes: