ARM: dts: aspeed: Enable IPMI BT node on OpenPower machines

These BMC systems require this device to communicate with the host.

Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts b/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
index 623b6ab..d41be52 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
@@ -257,3 +257,7 @@
 		aspeed,fan-tach-ch = /bits/ 8 <0x0e>;
 	};
 };
+
+&ibt {
+	status = "okay";
+};