ANDROID: GKI: rockchip: Add symbols for some charger and

1 function symbol(s) added
  'void kernel_power_off()'

Bug: 239396464
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Bian Jin chen <kenjc.bian@rock-chips.com>
Change-Id: I2ceb58bcf3ba2b5a11b1163dff41ebe1a7f77f0d