sim: set loop thread priority to configurable

Signed-off-by: ligd <liguiding1@xiaomi.com>

arch/sim/Kconfig

@@ -140,6 +140,13 @@ config SIM_WALLTIME_SIGNAL
 
 endchoice
 
+config SIM_LOOPTASK_PRIORITY
+	int "looptask priority"
+	default SCHED_HPWORKPRIORITY if SCHED_HPWORK
+	default 255 if !SCHED_HPWORK
+	---help---
+		Looptask priority
+
 config SIM_LOOPTASK_INTERVAL
 	int "looptask interval in us"
 	default 10000

arch/sim/src/sim/sim_initialize.c

@@ -310,7 +310,7 @@ void up_initialize(void)
   sim_usbhost_initialize();
 #endif
 
-  kthread_create("loop_task", SCHED_PRIORITY_MAX,
+  kthread_create("loop_task", CONFIG_SIM_LOOPTASK_PRIORITY,
                  CONFIG_DEFAULT_TASK_STACKSIZE,
                  sim_loop_task, NULL);
 }