ARM: EXYNOS: Move cpufreq and cpuidle device registration to init_machine

As exynos_cpuidle_init() and exynos_cpufreq_init() functions have just
one line of code for registering platform devices. So we can move them
to exynos_dt_machine_init() and remove exynos_cpuidle_init() and
exynos_cpufreq_init(). This will help in reducing lines of code in
exynos.c, making it more clean.
Suggested-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/exynos.c

@@ -165,17 +165,6 @@ static struct platform_device exynos_cpuidle = {
 	.id                = -1,
 };
 
-void __init exynos_cpuidle_init(void)
-{
-	if (soc_is_exynos4210() || soc_is_exynos5250())
-		platform_device_register(&exynos_cpuidle);
-}
-
-void __init exynos_cpufreq_init(void)
-{
-	platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
-}
-
 void __iomem *sysram_base_addr;
 void __iomem *sysram_ns_base_addr;
 
@@ -325,10 +314,11 @@ static void __init exynos_dt_machine_init(void)
 	if (!IS_ENABLED(CONFIG_SMP))
 		exynos_sysram_init();
 
-	if (!of_machine_is_compatible("samsung,exynos5420"))
-		exynos_cpuidle_init();
+	if (of_machine_is_compatible("samsung,exynos4210") ||
+			of_machine_is_compatible("samsung,exynos5250"))
+		platform_device_register(&exynos_cpuidle);
 
-	exynos_cpufreq_init();
+	platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }