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dt-bindings: net: bluetooth: qualcomm: document VDD_CH1

WCN3990 comes with two chains - CH0 and CH1 - where each takes VDD
regulator. It seems VDD_CH1 is optional (Linux driver does not care
about it), so document it to fix dtbs_check warnings like:

sdm850-lenovo-yoga-c630.dtb: bluetooth: 'vddch1-supply' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230617165716.279857-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

authored by

Krzysztof Kozlowski and committed by
Jakub Kicinski 6a0a6dd8 e748d0fd

+3
+3
Documentation/devicetree/bindings/net/bluetooth/qualcomm-bluetooth.yaml
··· 50 50 vddch0-supply: 51 51 description: VDD_CH0 supply regulator handle 52 52 53 + vddch1-supply: 54 + description: VDD_CH1 supply regulator handle 55 + 53 56 vddaon-supply: 54 57 description: VDD_AON supply regulator handle 55 58