ARM: EXYNOS: Kill exynos_pm_late_initcall()

The only thing exynos_pm_late_initcall() does is calling
pm_genpd_poweroff_unused(), which is already stubbed when
CONFIG_PM_GENERIC_DOMAINS is not enabled. So replace
exynos_pm_late_initcall() with a direct call to
pm_genpd_poweroff_unused().

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/common.h

@@ -26,12 +26,6 @@ void exynos_init_late(void);
 
 void exynos_firmware_init(void);
 
-#ifdef CONFIG_PM_GENERIC_DOMAINS
-int exynos_pm_late_initcall(void);
-#else
-static inline int exynos_pm_late_initcall(void) { return 0; }
-#endif
-
 extern struct smp_operations exynos_smp_ops;
 
 extern void exynos_cpu_die(unsigned int cpu);