[ARM] Kirkwood: Add support for QNAP TS-119/TS-219 Turbo NAS

Add support for the QNAP TS-119 and TS-219 Turbo NAS devices.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>