pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()

To make sure genpd tries to power off unused PM domains, let's call
of_genpd_sync_state() from our own ->sync_state() callback.

Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konradybcio@kernel.org>
Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250701114733.636510-14-ulf.hansson@linaro.org

drivers/pmdomain/qcom/rpmhpd.c

@@ -1046,6 +1046,8 @@ static void rpmhpd_sync_state(struct device *dev)
 	unsigned int i;
 	int ret;
 
+	of_genpd_sync_state(dev->of_node);
+
 	mutex_lock(&rpmhpd_lock);
 	for (i = 0; i < desc->num_pds; i++) {
 		pd = rpmhpds[i];