sun50i: h5: Add NanoPi Neo Plus2 DT initial support

sun50i: h5: Add NanoPi Neo Plus2 DT initial support

Add initial DT for NanoPi NEO Plus2 by FriendlyARM
- Allwinner quad core H5 Cortex A53 with an ARM Mali-450MP GPU
- 1 GB DDR3 RAM
- 8GB eMMC flash (Samsung KLM8G1WEPD-B031)
- micro SD card slot
- Gigabit Ethernet (external RTL8211E-VB-CG chip)
- 802.11 b/g/n WiFi, Bluetooth 4.0 (Ampak AP6212A module)
- 2x USB 2.0 host ports

Signed-off-by: Antony Antony <antony@phenome.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>