ARM: imx27, imx5: Add kconfig selects for cpufreq-cpu0

There are some config options not selected by imx27 and imx5 that are
necessary to use the cpufreq-cpu0 driver.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/Kconfig

@@ -118,6 +118,8 @@ config SOC_IMX25
 
 config SOC_IMX27
 	bool
+	select ARCH_HAS_CPUFREQ
+	select ARCH_HAS_OPP
 	select COMMON_CLK
 	select CPU_ARM926T
 	select IMX_HAVE_IOMUX_V1
@@ -145,6 +147,7 @@ config SOC_IMX35
 config SOC_IMX5
 	bool
 	select ARCH_HAS_CPUFREQ
+	select ARCH_HAS_OPP
 	select ARCH_MXC_IOMUX_V3
 	select COMMON_CLK
 	select CPU_V7