drm/amd/display: Improve dce_aux_transfer_with_retries logging

[Why + How]
Payload reply is unknown and not handled in switch statement.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>