Nuttx Upgrade:Adds sem_setprotocol

src/drivers/device/vdev_posix.cpp

@@ -278,8 +278,12 @@ extern "C" {
 		}
 
 		PX4_DEBUG("Called px4_poll timeout = %d", timeout);
+
 		px4_sem_init(&sem, 0, 0);
 
+		// sem use case is a signal
+		px4_sem_setprotocol(&sem, SEM_PRIO_NONE);
+
 		// Go through all fds and check them for a pollable state
 		bool fd_pollable = false;
 
@@ -409,6 +413,11 @@ extern "C" {
 	void px4_enable_sim_lockstep()
 	{
 		px4_sem_init(&lockstep_sem, 0, 0);
+
+		// lockstep_sem use case is a signal
+
+		px4_sem_setprotocol(&lockstep_sem, SEM_PRIO_NONE);
+
 		sim_lockstep = true;
 		sim_delay = false;
 	}