dt-bindings: regulator: Add mps,mpq7932 power-management IC

Document mpq7932 power-management IC

Signed-off-by: Saravanan Sekar <saravanan@linumiz.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221207173716.123223-3-saravanan@linumiz.com


Signed-off-by: Rob Herring <robh@kernel.org>