soc: qcom: pmic_glink: register ucsi aux device

Only register UCSI on know working devices, like on the SM8450
or SM8550 which requires UCSI to get USB mode switch events.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230130-topic-sm8450-upstream-pmic-glink-v5-4-552f3b721f9e@linaro.org