ARM: dts: aspeed: Add IPMI BT node

The IPMI BT device part of the LPC interface and is used for
communication with the host processor.
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-g4.dtsi

@@ -247,6 +247,13 @@ lhc: lhc@20 {
 						compatible = "aspeed,ast2400-lhc";
 						reg = <0x20 0x24 0x48 0x8>;
 					};
+
+					ibt: ibt@c0  {
+						compatible = "aspeed,ast2400-ibt-bmc";
+						reg = <0xc0 0x18>;
+						interrupts = <8>;
+						status = "disabled";
+					};
 				};
 			};
 

arch/arm/boot/dts/aspeed-g5.dtsi

@@ -298,6 +298,13 @@ lhc: lhc@20 {
 						compatible = "aspeed,ast2500-lhc";
 						reg = <0x20 0x24 0x48 0x8>;
 					};
+
+					ibt: ibt@c0 {
+						compatible = "aspeed,ast2500-ibt-bmc";
+						reg = <0xc0 0x18>;
+						interrupts = <8>;
+						status = "disabled";
+					};
 				};
 			};