drm/amd/display: do not set traslate_by_source for DCN401 cursor

drm/amd/display: do not set traslate_by_source for DCN401 cursor

translate_by_source need not be set for DCN401 onwards since cursor
cursor composition comes after scaler in the hardware pipeline.
Hence offset calculation has been reworked, and this setting is not
necessary to be enabled anymore.

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>