drm/amd/display: hdcp not enabled on connector 0

[Why]
incorrect skip when drm_connector.index = 0 within
event_property_validate and update

[How] handle hdcp validate and update for connector 0

Tested-by: Daniel Wheeler <Daniel.Wheeler@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>