ARM: EXYNOS: Add generic compatible strings

Add generic compatible strings for Exynos4 and 5 platforms so that
future SoCs can use them if there is nothing extra/specific to be
differentiated.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/exynos.c

@@ -367,9 +367,11 @@ static void __init exynos_dt_machine_init(void)
 }
 
 static char const *exynos_dt_compat[] __initconst = {
+	"samsung,exynos4",
 	"samsung,exynos4210",
 	"samsung,exynos4212",
 	"samsung,exynos4412",
+	"samsung,exynos5",
 	"samsung,exynos5250",
 	"samsung,exynos5420",
 	"samsung,exynos5440",