interconnect: qcom: qcm2290: Enable sync state

interconnect: qcom: qcm2290: Enable sync state

Enable the generic .sync_state callback to ensure there are no
outstanding votes that would waste power.

Generally one would need a bunch of interface clocks to access the QoS
registers when trying to go over all possible nodes during sync_state,
but QCM2290 surprisingly does not seem to require any such handling.

Fixes: 1a14b1ac3935 ("interconnect: qcom: Add QCM2290 driver support")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230720-topic-qcm2290_icc-v2-2-a2ceb9d3e713@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>