x86: move cpufreq Kconfigs to the same directory

Move the 64bit Kconfig file to arch/x86/kernel/cpu/cpufreq, so we
can unify them.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/i386/Kconfig

@@ -1080,7 +1080,7 @@ config APM_REAL_MODE_POWER_OFF
 
 endif # APM
 
-source "arch/x86/kernel/cpu/cpufreq/Kconfig"
+source "arch/x86/kernel/cpu/cpufreq/Kconfig_32"
 
 endmenu
 

arch/x86_64/Kconfig

@@ -723,7 +723,7 @@ config ARCH_HIBERNATION_HEADER
 
 source "drivers/acpi/Kconfig"
 
-source "arch/x86/kernel/cpufreq/Kconfig"
+source "arch/x86/kernel/cpu/cpufreq/Kconfig_64"
 
 endmenu