ARM: dts: aspeed: mtmitchell: Add MCTP

Enable MCTP driver on I2C3 bus for MCTP transaction
Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230620092537.20007-4-chanh@os.amperecomputing.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts

@@ -4,6 +4,7 @@
 /dts-v1/;
 
 #include "aspeed-g6.dtsi"
+#include <dt-bindings/i2c/i2c.h>
 #include <dt-bindings/gpio/aspeed-gpio.h>
 
 / {
@@ -367,6 +368,14 @@ psu@59 {
 
 &i2c3 {
 	status = "okay";
+	bus-frequency = <1000000>;
+	multi-master;
+	mctp-controller;
+
+	mctp@10 {
+		compatible = "mctp-i2c-controller";
+		reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+	};
 };
 
 &i2c4 {