drm/amdgpu: use new method to program rlc ram

Program rlc ram with golden setting data instead.
The old method (program_imu_rlc_ram_old) should be
retired in the future.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>