ARM: EXYNOS: Use of_machine_is_compatible instead of soc_is_exynos4

of_machine_is_compatible() seems to be preferred over soc_is_exynos4().
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

arch/arm/mach-exynos/exynos.c

@@ -179,7 +179,7 @@ static void __init exynos_init_io(void)
  */
 void exynos_set_delayed_reset_assertion(bool enable)
 {
-	if (soc_is_exynos4()) {
+	if (of_machine_is_compatible("samsung,exynos4")) {
 		unsigned int tmp, core_id;
 
 		for (core_id = 0; core_id < num_possible_cpus(); core_id++) {