arm: exynos: Enable OPP library support for exynos5440

The OPP library support is needed for exynos5440 cpu frequency
dynamic scaling driver.

Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/arm/mach-exynos/Kconfig

@@ -72,10 +72,12 @@ config SOC_EXYNOS5440
 	bool "SAMSUNG EXYNOS5440"
 	default y
 	depends on ARCH_EXYNOS5
+	select ARCH_HAS_OPP
 	select ARM_ARCH_TIMER
 	select AUTO_ZRELADDR
 	select PINCTRL
 	select PINCTRL_EXYNOS5440
+	select PM_OPP
 	help
 	  Enable EXYNOS5440 SoC support