arm64: dts: qcom: pm8150b: change vbus-regulator node name

Use the node name as now defined in the spmi-pmic bindings.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221031173933.936147-3-luca@z3ntu.xyz