ARM: imx: add select on ARCH_MXC for cpufreq support

Move ARCH_HAS_CPUFREQ, ARCH_HAS_OPP and PM_OPP on ARCH_MXC so that
the user can enable the cpufreq support for iMX6Q and/or iMX6SL.
Signed-off-by: John Tobias <john.tobias.ph@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/Kconfig

 config ARCH_MXC
 	bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7
+	select ARCH_HAS_CPUFREQ
+	select ARCH_HAS_OPP
 	select ARCH_REQUIRE_GPIOLIB
 	select ARM_CPU_SUSPEND if PM
 	select CLKSRC_MMIO
 	select GENERIC_ALLOCATOR
 	select GENERIC_IRQ_CHIP
 	select PINCTRL
+	select PM_OPP if PM
 	select SOC_BUS
 	help
 	  Support for Freescale MXC/iMX-based family of processors
@@ -777,8 +780,6 @@ config	SOC_IMX53
 
 config SOC_IMX6Q
 	bool "i.MX6 Quad/DualLite support"
-	select ARCH_HAS_CPUFREQ
-	select ARCH_HAS_OPP
 	select ARM_ERRATA_754322
 	select ARM_ERRATA_764369 if SMP
 	select ARM_ERRATA_775420
@@ -796,7 +797,6 @@ config SOC_IMX6Q
 	select PL310_ERRATA_588369 if CACHE_PL310
 	select PL310_ERRATA_727915 if CACHE_PL310
 	select PL310_ERRATA_769419 if CACHE_PL310
-	select PM_OPP if PM
 
 	help
 	  This enables support for Freescale i.MX6 Quad processor.