arm64: dts: qcom: pm7250b: Add node for PMIC VBUS booster

arm64: dts: qcom: pm7250b: Add node for PMIC VBUS booster

Add the required DTS node for the USB VBUS output regulator, which is
available on PM7250B. This will provide the VBUS source to connected
peripherals.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240530-fp4-tcpm-v3-1-612d4bbd5e09@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>