ipq806x: enable ondemand governor

Signed-off-by: John Crispin <[email protected]>

target/linux/ipq806x/config-4.4

@@ -89,8 +89,9 @@ CONFIG_CPU_CP15=y
 CONFIG_CPU_CP15_MMU=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+CONFIG_CPU_FREQ_GOV_COMMON=y
 # CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
-# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_GOV_ONDEMAND=y
 CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 # CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
 # CONFIG_CPU_FREQ_GOV_USERSPACE is not set