dm: exynos: Bring in pinctrl dts files from Linux kernel

Bring in required device tree files for pinctrl from Linux v3.14. These
are initially unchanged and have a number of pieces not needed by U-Boot.

Note that exynos5420 is renamed to exynos54xx here since we want to
support exynos5422 also.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/exynos4210-universal_c210.dts b/arch/arm/dts/exynos4210-universal_c210.dts
index d30f131..cf3354f 100644
--- a/arch/arm/dts/exynos4210-universal_c210.dts
+++ b/arch/arm/dts/exynos4210-universal_c210.dts
@@ -8,7 +8,7 @@
  */
 
 /dts-v1/;
-#include "exynos4.dtsi"
+#include "exynos4210.dtsi"
 
 / {
 	model = "Samsung Universal C210 based on Exynos4210 rev0";