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-spring.dts b/arch/arm/dts/exynos5250-spring.dts
index 76d5323..81b3d29 100644
--- a/arch/arm/dts/exynos5250-spring.dts
+++ b/arch/arm/dts/exynos5250-spring.dts
@@ -59,6 +59,14 @@
 					 <&gpy4 2 0>;
 	};
 
+	i2c@12C90000 {
+		clock-frequency = <100000>;
+		tpm@20 {
+			reg = <0x20>;
+			compatible = "infineon,slb9645tt";
+		};
+	};
+
 	mmc@12200000 {
 		samsung,bus-width = <8>;
 		samsung,timing = <1 3 3>;