qcacmn: Move delayed-reg-work active_work_cnt decrement

Currently, we decrement active_work_cnt in a while loop in delayed
register worker and later on make a "allow_l1" call to enable L1ss.
The bus suspend routine depends on the value of active_work_cnt to
determine if any register writes are pending. In case there are, bus
suspend is rejected.
As a result its possible that when bus suspend happens, the
delayed worker while processing the last remaining enqueued
write,  makes the active_work_cnt to 0. This will allow the bus suspend
routine to continue to disable the bus, even before the
delayed-reg-worker has called allow_l1 and run to completion. This may
lead to a NOC error while calling "allow_l1" API from
delayed-reg-worker.

Hence, move the decrement of active_work_cnt to the very end in
hal_reg_write_work function.

Change-Id: Iec602f97c953df1c6a018310fd02ab458547ce3a
CRs-fixed: 2813733

dp/wifi3.0/dp_main.c

@@ -11526,8 +11526,6 @@ static QDF_STATUS dp_bus_suspend(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 		dp_service_mon_rings(soc, DP_MON_REAP_BUDGET);
 	}
 
-	hal_flush_reg_write_work(soc->hal_soc);
-
 	return QDF_STATUS_SUCCESS;
 }