ARM: dts: aspeed: rainier: Enable VUART1

Like most OpenPower machines the VUART is expected to be at /dev/ttyS5
for communication with the host over LPC.
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts

@@ -882,6 +882,10 @@ eeprom@50 {
 	};
 };
 
+&vuart1 {
+	status = "okay";
+};
+
 &lpc_ctrl {
 	status = "okay";
 	memory-region = <&flash_memory>;