ipq807x: Enable CPU frequency scaling stats

Enable the CPU frequency scaling statistics in kernel config.

Signed-off-by: Hannu Nyman <[email protected]>
Reviewed-by: Robert Marko <[email protected]>

target/linux/ipq807x/config-5.15

@@ -73,7 +73,7 @@ CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 # CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
 CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
 # CONFIG_CPU_FREQ_GOV_USERSPACE is not set
-# CONFIG_CPU_FREQ_STAT is not set
+CONFIG_CPU_FREQ_STAT=y
 CONFIG_CPU_FREQ_THERMAL=y
 CONFIG_CPU_IDLE=y
 CONFIG_CPU_IDLE_GOV_MENU=y