drm/amdgpu: Optimize xxx_ras_late_init function of each ras block

1. Move calling ras block instance members from module internal
   function to the top calling xxx_ras_late_init.
2. Module internal function calls can only use parameter variables
   of xxx_ras_late_init instead of ras block instance members.

Signed-off-by: yipechai <YiPeng.Chai@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>