dt-bindings: mfd: qcom,spmi-pmic: Add pbs to SPMI device types

Add the PBS (Programmable Boot Sequencer) to the list of devices.

Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240412-pmi632-ppg-v2-1-8ac892b1bb61@fairphone.com


Signed-off-by: Lee Jones <lee@kernel.org>