drm/amdgpu: update rlc ram for gc v11_0_2

Add imu rlc ram register settings for gc v11_0_2

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>