drm/amd/display: export get_power_profile interface for later use

drm/amd/display: export get_power_profile interface for later use

[why]
export dcn401 get_power_profile for later asic.

Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>