amdgpu/pm: Optimize emit_clock_levels for arcturus - part 3

   split switch statement into two and consolidate the common
     code for printing most of the types of clock speeds

Signed-off-by: Darren Powell <darren.powell@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>