Fix below warning with proper usage.
CHECK   drivers/gpu/drm/i915//gvt/dmabuf.c
drivers/gpu/drm/i915//gvt/dmabuf.c:462 intel_vgpu_get_dmabuf() error: 'vgpu' dereferencing possible ERR_PTR()
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
 
        obj = vgpu_create_gem(dev, dmabuf_obj->info);
        if (obj == NULL) {
-               gvt_vgpu_err("create gvt gem obj failed:%d\n", vgpu->id);
+               gvt_vgpu_err("create gvt gem obj failed\n");
                ret = -ENOMEM;
                goto out;
        }