ARM: SPEAr13xx: Enable CONFIG_ARCH_HAS_CPUFREQ

SPEAr13xx supports cpufreq and has an upstreamed driver for it. This patch
enables cpufreq configs for SPEAr13xx.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/plat-spear/Kconfig

@@ -10,6 +10,7 @@ choice
 
 config ARCH_SPEAR13XX
 	bool "ST SPEAr13xx with Device Tree"
+	select ARCH_HAVE_CPUFREQ
 	select ARM_GIC
 	select CPU_V7
 	select GPIO_SPEAR_SPICS