regulator: pca9450: Add sd-vsel GPIO
Add the binding documentation for the optional sd-vsel GPIO. Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> Link: https://lore.kernel.org/r/20210211105534.38972-2-frieder.schrempf@kontron.de Signed-off-by: Mark Brown <broonie@kernel.org>
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