Note when we're done probing PNP. There's been several reports over the

years of hangs that turned out to be in the PNP code.  Add an explicit end
marker so such hangs are more apparent.

sys/isa/pnp.c

@@ -800,6 +800,8 @@ pnp_identify(driver_t *driver, device_t parent)
 		if (num_pnp_devs)
 			break;
 	}
+	if (bootverbose)
+		printf("PNP Identify complete\n");
 }
 
 static device_method_t pnp_methods[] = {