arm: dts: exynos: Extend board description

u-boot uses the same DTS for the all Odroid XU3-based boards, so list
them in the model description to let user know that those boards are
supported.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/dts/exynos5422-odroidxu3.dts b/arch/arm/dts/exynos5422-odroidxu3.dts
index 6df6be9..256df6d 100644
--- a/arch/arm/dts/exynos5422-odroidxu3.dts
+++ b/arch/arm/dts/exynos5422-odroidxu3.dts
@@ -10,7 +10,7 @@
 #include "exynos54xx.dtsi"
 
 / {
-	model = "Odroid XU3 based on EXYNOS5422";
+	model = "Odroid XU3/XU4/HC1/HC2 based on Exynos5422";
 	compatible = "samsung,odroidxu3", "samsung,exynos5";
 
 	aliases {