ANDROID: GKI: rockchip: Enable symbols for dw_8250

Leaf changes summary: 7 artifacts changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 7 Added functions
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

7 Added functions:

  [A] 'function bool of_device_is_big_endian(const device_node*)'
  [A] 'function void serial8250_clear_and_reinit_fifos(uart_8250_port*)'
  [A] 'function void serial8250_do_pm(uart_port*, unsigned int, unsigned int)'
  [A] 'function void serial8250_do_set_divisor(uart_port*, unsigned int, unsigned int, unsigned int)'
  [A] 'function void serial8250_do_set_ldisc(uart_port*, ktermios*)'
  [A] 'function int serial8250_handle_irq(uart_port*, unsigned int)'
  [A] 'function void serial8250_update_uartclk(uart_port*, unsigned int)'

Bug: 194515348
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Change-Id: I9e8e98a5d9c31eef21899de4eca9fa4a8c8416de