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>
diff --git a/arch/sandbox/dts/sandbox64.dts b/arch/sandbox/dts/sandbox64.dts
index 8f707b4..48e420e 100644
--- a/arch/sandbox/dts/sandbox64.dts
+++ b/arch/sandbox/dts/sandbox64.dts
@@ -242,6 +242,10 @@
 		compatible = "google,sandbox-tpm";
 	};
 
+	tpm2 {
+		compatible = "sandbox,tpm2";
+	};
+
 	triangle {
 		compatible = "demo-shape";
 		colour = "cyan";