ANDROID: GKI: rockchip: Add symbols for drm dp

Leaf changes summary: 4 artifacts changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 4 Added functions
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

4 Added functions:

  [A] 'function edid* drm_bridge_get_edid(drm_bridge*, drm_connector*)'
  [A] 'function int drm_dp_read_desc(drm_dp_aux*, drm_dp_desc*, bool)'
  [A] 'function int drm_dp_read_sink_count(drm_dp_aux*)'
  [A] 'function bool drm_probe_ddc(i2c_adapter*)'

Bug: 239396464
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Change-Id: I3d07fdd9c0e03ee4b631eb3026e6d2063bf16df9