UPSTREAM: drm/virtio: use virtio_gpu_object->hw_res_handle in virtio_gpu_mode_dumb_create()

Drop pointless resid variable in virtio_gpu_mode_dumb_create(), just use
the hw_res_handle field in virtio_gpu_object directly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20181019061847.18958-4-kraxel@redhat.com


(cherry picked from commit c40336ba5ed6c67e131cbf82a4fa37faf3bf0ed3)
Signed-off-by: Greg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: I151241825d4c8c51297d29bd229d3cd6ccf411af