interconnect: qcom: sm8550: Enable sync_state

To ensure the interconnect votes are actually meaningful and in order to
prevent holding all buses at FMAX, introduce the sync state callback.

Fixes: e6f0d6a3 ("interconnect: qcom: Add SM8550 interconnect provider driver")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20231218-topic-8550_fixes-v1-2-ce1272d77540@linaro.org


Signed-off-by: Georgi Djakov <djakov@kernel.org>