arm64: defconfig: Enable QCOM PBS

Enable the PBS driver used on e.g. PMI632.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20240205-pmi632-ppg-v1-3-e236c95a2099@fairphone.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>