arm: kirkwood: Enable cpufreq and ondemand on kirkwood_defconfig

Now that we have a cpufreq driver for kirkwood, enable it in
kirkwood_defconfig and set the default governer to ondemand.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/configs/kirkwood_defconfig

@@ -60,6 +60,9 @@ CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set
 CONFIG_ZBOOT_ROM_TEXT=0x0
 CONFIG_ZBOOT_ROM_BSS=0x0
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_STAT_DETAILS=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
 CONFIG_CPU_IDLE=y
 CONFIG_NET=y
 CONFIG_PACKET=y