dt-bindings: vendor-prefixes: add AZW

Shenzhen AZW Technology Co. Ltd. is a manufacturer specialized in Android
smart TV boxes, Intel mini PCs and home cloud TV boxes with NAS.

Add the vendor prefix for AZW.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>