sandbox: dts: add Sandbox TPMv2.x node

This node declares the presence of the Sandbox TPMv2.x emulated chip,
available for testing.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/sandbox/dts/sandbox.dts

@@ -242,6 +242,10 @@
 		compatible = "google,sandbox-tpm";
 	};
 
+	tpm2 {
+		compatible = "sandbox,tpm2";
+	};
+
 	triangle {
 		compatible = "demo-shape";
 		colour = "cyan";

arch/sandbox/dts/sandbox64.dts

@@ -242,6 +242,10 @@
 		compatible = "google,sandbox-tpm";
 	};
 
+	tpm2 {
+		compatible = "sandbox,tpm2";
+	};
+
 	triangle {
 		compatible = "demo-shape";
 		colour = "cyan";

arch/sandbox/dts/test.dts

@@ -422,6 +422,10 @@
 		clock-frequency = <1000000>;
 	};
 
+	tpm2 {
+		compatible = "sandbox,tpm2";
+	};
+
 	uart0: serial {
 		compatible = "sandbox,serial";
 		u-boot,dm-pre-reloc;