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 <[e-mail]>
Cc: Konrad Dybcio <[e-mail]>
Tested-by: Hiago De Franco <[e-mail]> # Colibri iMX8X
Tested-by: Tomi Valkeinen <[e-mail]> # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/pmdomain/qcom/rpmhpd.c

···
 	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];