powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards

Add simple cpufreq driver for Maple-based boards (ppc970fx evaluation
kit and others). Driver is based on a cpufreq driver for 64-bit powermac
boxes with all pmac-dependant features removed and simple cleanup
applied.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 9fb8485..61ae639 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -184,5 +184,10 @@
 source "drivers/cpufreq/Kconfig.x86"
 endmenu
 
+menu "PowerPC CPU frequency scaling drivers"
+depends on PPC32 || PPC64
+source "drivers/cpufreq/Kconfig.powerpc"
+endmenu
+
 endif
 endmenu