configs/orangepi_zero2w: new board

This patch adds basic support for the new OrangePi Zero2W board:
- http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-Zero-2W.html

Brief summary of the board features:
- H618 Allwinner SoC
  - Quad-Core ARM Cortex-A53 Processor 1.5GHz
  - Mali G31 MP2 GPU
- LPDDR4: 1GB/2GB/4GB
- Wi-Fi5.0+BT 5.0
- 2x Type-C USB 2.0
- 1x Mini HDMI
- Wi-Fi 5.0 + BT 5.0
- 40-pin expansion interface (GPIO / UART / I2C / SPI / PWM)
- 24-pin expansion interface (2x USB 2.0 / ETH / IR / audio)

BSP includes the following components:
- mainline ATF v2.10
- mainline U-Boot v2024.04
- mainline Linux kernel v6.8

No custom scripts required: all is covered by common orangepi scripts.
However new option BR2_DOWNLOAD_FORCE_CHECK_HASHES requires checksums
for all the BSP components. They are added as board specific patches.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/orangepi/orangepi-zero2w/patches/arm-trusted-firmware/arm-trusted-firmware.hash

@@ -0,0 +1,2 @@
+# Locally computed:
+sha256  2e18b881ada9198173238cca80086c787b1fa3f698944bde1743142823fc511c  arm-trusted-firmware-v2.10.tar.gz

board/orangepi/orangepi-zero2w/patches/linux-headers/linux-headers.hash

@@ -0,0 +1 @@
+../linux/linux.hash

board/orangepi/orangepi-zero2w/patches/linux/linux.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  9e723232d603ab45ebf043c34714c48f277ab195c29abcb8472f2a4c3a5a1995  linux-6.8.6.tar.xz

board/orangepi/orangepi-zero2w/patches/uboot/uboot.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  18a853fe39fad7ad03a90cc2d4275aeaed6da69735defac3492b80508843dd4a  u-boot-2024.04.tar.bz2

board/orangepi/orangepi-zero2w/readme.txt

@@ -0,0 +1,32 @@
+Intro
+=====
+
+This default configuration will allow you to start experimenting with the
+buildroot environment for the OrangePi Zero2W. Current configuration will
+bring-up the board and allow access through the serial console.
+
+Orangepi Zero 2W links:
+- http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-Zero-2W.html
+- https://linux-sunxi.org/Xunlong_Orange_Pi_Zero2W
+
+How to build
+============
+
+    $ make orangepi_zero2w_defconfig
+    $ make
+
+Note: you will need access to the internet to download the required sources.
+
+How to write the SD card
+========================
+
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
+
+Copy the bootable "sdcard.img" onto an SD card with "dd":
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/sdX
+  $ sudo sync
+
+Insert the micro SDcard in your Orangepi Zero2W and power it up. The console
+is on the serial line, 115200 8N1.