exynos: x86: dts: Add tpm nodes to the device tree for Chrome OS devices

Add a TPM node to the various Chromebooks so that driver can be converted to
driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard<christophe-h.ricard@st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/dts/exynos5250-snow.dts b/arch/arm/dts/exynos5250-snow.dts
index 32c0098..bda5499 100644
--- a/arch/arm/dts/exynos5250-snow.dts
+++ b/arch/arm/dts/exynos5250-snow.dts
@@ -206,6 +206,15 @@
 		};
 	};
 
+	i2c@12C90000 {
+		clock-frequency = <100000>;
+		tpm@20 {
+			reg = <0x20>;
+			u-boot,i2c-offset-len = <0>;
+			compatible = "infineon,slb9635tt";
+		};
+	};
+
 	spi@12d30000 {
 		spi-max-frequency = <50000000>;
 		firmware_storage_spi: flash@0 {