regulator: dt-bindings: qcom,rpm: fix pattern for children

The "or" (|) in regular expression must be within parentheses,
otherwise it is not really an "or" and it matches supplies:

qcom-apq8060-dragonboard.dtb: regulators-1: vdd_ncp-supply: [[34]] is not of type 'object'

Fixes: fde0e25b71a9 ("dt-bindings: regulators: convert non-smd RPM Regulators bindings to dt-schema")
Cc: [e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

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

···
   ".*-supply$":
     description: Input supply phandle(s) for this node
 
-  "^((s|l|lvs)[0-9]*)|(s[1-2][a-b])|(ncp)|(mvs)|(usb-switch)|(hdmi-switch)$":
+  "^((s|l|lvs)[0-9]*|s[1-2][a-b]|ncp|mvs|usb-switch|hdmi-switch)$":
     description: List of regulators and its properties
     $ref: regulator.yaml#
     unevaluatedProperties: false