ARM: dts: Correct the /include entry on exynos5420 dtsi file

This patch corrects the /include to #include on exynos5420
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5420.dtsi

@@ -14,7 +14,7 @@
  */
 
 #include "exynos5.dtsi"
-/include/ "exynos5420-pinctrl.dtsi"
+#include "exynos5420-pinctrl.dtsi"
 / {
 	compatible = "samsung,exynos5420";