drm/radeon/kms: make initial state of load detect property correct.

this was incorrect on my rs480.

Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/radeon/radeon_connectors.c

···
 				radeon_connector->dac_load_detect = false;
 			drm_connector_attach_property(&radeon_connector->base,
 						      rdev->mode_info.load_detect_property,
-						      1);
+						      radeon_connector->dac_load_detect);
 			drm_connector_attach_property(&radeon_connector->base,
 						      rdev->mode_info.tv_std_property,
 						      radeon_combios_get_tv_info(rdev));