ARM: dts: aspeed: Add LPC Snoop device

LPC snoop hardware on the ASPEED BMC, used for monitoring
host I/O port activity.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>

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

@@ -237,6 +237,13 @@ lpc_ctrl: lpc-ctrl@0 {
 						status = "disabled";
 					};
 
+					lpc_snoop: lpc-snoop@0 {
+						compatible = "aspeed,ast2400-lpc-snoop";
+						reg = <0x0 0x80>;
+						interrupts = <8>;
+						status = "disabled";
+					};
+
 					lhc: lhc@20 {
 						compatible = "aspeed,ast2400-lhc";
 						reg = <0x20 0x24 0x48 0x8>;

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

@@ -288,6 +288,12 @@ lpc_ctrl: lpc-ctrl@0 {
 						status = "disabled";
 					};
 
+					lpc_snoop: lpc-snoop@0 {
+						compatible = "aspeed,ast2500-lpc-snoop";
+						reg = <0x0 0x80>;
+						interrupts = <8>;
+						status = "disabled";
+					};
 
 					lhc: lhc@20 {
 						compatible = "aspeed,ast2500-lhc";