Make the ti_sysc device quiet. It's an internal utility pseudo-device

that makes the upstream FDT data work right, so we don't need to see a
couple dozen instances of it spam the dmesg at boot time unless it's a
verbose boot.

sys/arm/ti/ti_sysc.c

@@ -71,6 +71,9 @@ ti_sysc_probe(device_t dev)
 		return (ENXIO);
 
 	device_set_desc(dev, "TI SYSC Interconnect");
+	if (!bootverbose)
+		device_quiet(dev);
+
 	return (BUS_PROBE_DEFAULT);
 }