drm/amd/display: fix dp_ss_control vbios flag parsing

dp_ss_control = 0 means ss is off, we had a typo where
we would double not dp_ss_control while setting dp_ss_off
flag
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -1040,7 +1040,7 @@ static bool construct(
 	link->link_id = bios->funcs->get_connector_id(bios, init_params->connector_index);
 
 	if (dc_ctx->dc_bios->integrated_info)
-		link->dp_ss_off = !!dc_ctx->dc_bios->integrated_info->dp_ss_control;
+		link->dp_ss_off = !dc_ctx->dc_bios->integrated_info->dp_ss_control;
 
 	if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
 		dm_error("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",