[Why&How]
Create a separate dcn21_fast_validate_bw function for dcn21.
Signed-off-by: NDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: NAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>