radeonsi: call si_init_atom for remaining radeonsi atoms

radeonsi: call si_init_atom for remaining radeonsi atoms

I need to initialize more atom IDs.

This adds 4 more si_init_atom calls, which simplifies the code.
(si_init_atom needs a different context type of the emit functions though)

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>