opensm/osm_perfmgr.c: Don't rely on PortInfo:PortState for base SP0

For base SP0, PortState in SM PortInfo attribute is not used and base SP0 is always "active".

---

index 6a1fa63..86efde6 100644
@@ -684,6 +684,10 @@ static unsigned is_sm_port_down(osm_sm_t * sm)
 	}
 	CL_PLOCK_RELEASE(sm->p_lock);
 
+	if (p_port->p_node->sw &&
+	    !ib_switch_info_is_enhanced_port0(&p_port->p_node->sw->switch_info))
+		return 0;	/* base SP0 */
+
 	return osm_physp_get_port_state(p_port->p_physp) == IB_LINK_DOWN;
 }
 

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Hi Hal,

Applied. Thanks.
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