ANDROID: GKI: Add symbols for rockchip devfreq

INFO: ABI DIFFERENCES HAVE BEEN DETECTED!
INFO: 6 function symbol(s) added
  'int devfreq_event_disable_edev(struct devfreq_event_dev*)'
  'int devfreq_event_enable_edev(struct devfreq_event_dev*)'
  'struct devfreq_event_dev* devfreq_event_get_edev_by_phandle(struct device*, const char*, int)'
  'int devfreq_event_get_edev_count(struct device*, const char*)'
  'int devfreq_event_get_event(struct devfreq_event_dev*, struct devfreq_event_data*)'
  'int devm_devfreq_register_opp_notifier(struct device*, struct devfreq*)'

Bug: 300024866
Change-Id: I5db2294c3bc3e7e6dc9932551073310aec7065dc
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>