ARM: dts: sun8i: h3: bluetooth for Banana Pi M2 Zero board

The Banana Pi M2 Zero board has an AP6212 BT+Wifi combo chip
with Broadcom internals attached to UART1 and some gpios.
This addition is in line with similar boards.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>