drm/amdgpu: enable IP discovery for vangogh

enable IP discovery for vangogh.
Reviewed-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NXiaomeng Hou <Xiaomeng.Hou@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/nv.c

@@ -449,10 +449,6 @@ static int nv_reg_base_init(struct amdgpu_device *adev)
 {
 	int r;
 
-	/* IP discovery table is not available yet */
-	if (adev->asic_type == CHIP_VANGOGH)
-		goto legacy_init;
-
 	if (amdgpu_discovery) {
 		r = amdgpu_discovery_reg_base_init(adev);
 		if (r) {