ANDROID: GKI: rockchip: Enable symbols for rtc-rk808

Functions changes summary: 0 Removed, 0 Changed (4066 filtered out), 2 Added functions
Variables changes summary: 0 Removed, 0 Changed (397 filtered out), 0 Added variables

2 Added functions:

  [A] 'function unsigned int _bcd2bin(unsigned char)'
  [A] 'function unsigned char _bin2bcd(unsigned int)'

Bug: 194515348
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: If6b62156f3b6e23e1347e3c2c3279d626f732080