udmabuf: separate out creating/destroying scatter-table
These are nice functions and can be re-used. Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-3-gurchetansingh@chromium.org Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>