[POWERPC] Clean up cpufreq Kconfig dependencies

Shuffle Kconfig order, making the platform drivers menu depend on the global
option instead of each driver being dependent on it.

Also fix dependency of PPC_PMAC on the G5 one.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/Kconfig

@@ -148,14 +148,14 @@ config GENERIC_IOMAP
 	bool
 	default n
 
-menu "CPU Frequency support"
-	depends on PPC64 || CLASSIC32
-
 source "drivers/cpufreq/Kconfig"
 
+menu "CPU Frequency drivers"
+	depends on CPU_FREQ
+
 config CPU_FREQ_PMAC
 	bool "Support for Apple PowerBooks"
-	depends on CPU_FREQ && ADB_PMU && PPC32
+	depends on ADB_PMU && PPC32
 	select CPU_FREQ_TABLE
 	help
 	  This adds support for frequency switching on Apple PowerBooks,
@@ -164,7 +164,7 @@ config CPU_FREQ_PMAC
 
 config CPU_FREQ_PMAC64
 	bool "Support for some Apple G5s"
-	depends on CPU_FREQ && PPC64
+	depends on PPC_PMAC && PPC64
 	select CPU_FREQ_TABLE
 	help
 	  This adds support for frequency switching on Apple iMac G5,
@@ -172,7 +172,7 @@ config CPU_FREQ_PMAC64
 
 config PPC_PASEMI_CPUFREQ
 	bool "Support for PA Semi PWRficient"
-	depends on CPU_FREQ && PPC_PASEMI
+	depends on PPC_PASEMI
 	default y
 	select CPU_FREQ_TABLE
 	help