drm/radeon: clean up sumo_rlc_init() for code sharing
drm/radeon: clean up sumo_rlc_init() for code sharing

This will eventually be shared with newer asics to
reduce code duplication.

Signed-off-by: Alex Deucher <08dc22c6156113f2deff178e35e3ed9b24d6af9e@amd.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs