In some low-memory devices, it's hard to aquire large-orders pages,
this patch allowed user using scatter pages to register shm.
Signed-off-by: NPhil Chang <phil.chang@mediatek.com>
Reviewed-by: NSumit Garg <sumit.garg@linaro.org>
Signed-off-by: NJens Wiklander <jens.wiklander@linaro.org>