ARM: meson: add support for Odroid Go Ultra

This adds initial support for the Hardkernel Odroid Go Ultra.

The Odroid Go Ultra is a portable gaming device with the following
characteristics:
- Amlogic S922X SoC
- RK817 & RK818 PMICs
- 2GiB LPDDR4
- On board 16GiB eMMC
- Micro SD Card slot
- 5inch 854×480 MIPI-DSI TFT LCD
- Earphone stereo jack, 0.5Watt 8Ω Mono speaker
- Li-Polymer 3.7V/4000mAh Battery
- USB-A 2.0 Host Connector
- x16 GPIO Input Buttons
- 2x ADC Analog Joysticks
- USB-C Port for USB2 Device and Charging

The following are not yet handled:
- Battery RK818 Gauge and Charging
- 5inch 854×480 MIPI-DSI TFT LCD

Link: https://lore.kernel.org/r/20230119-u-boot-odroid-go-ultra-v1-2-f96bab9db396@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/doc/board/amlogic/index.rst b/doc/board/amlogic/index.rst
index 4d407f9..11443d9 100644
--- a/doc/board/amlogic/index.rst
+++ b/doc/board/amlogic/index.rst
@@ -19,7 +19,8 @@
 |                               | Nanopi-K2 | Khadas-VIM      | Libretech-PC | JetHub J100 | SEI510     | Khadas-VIM3 | Khadas-VIM3L |
 |                               | P200      | LibreTech-CC v1 | WeTek Core2  |             | Radxa Zero | GT-King/Pro | Odroid-C4    |
 |                               | P201      | LibreTech-AC v2 |              |             |            | GSKing-X    | Odroid-HC4   |
-|                               |           | JetHub J80      |              |             |            |             | BananaPi-M5  |
+|                               |           | JetHub J80      |              |             |            | Odroid-Go-  | BananaPi-M5  |
+|                               |           |                 |              |             |            | Ultra       |              |
 +-------------------------------+-----------+-----------------+--------------+-------------+------------+-------------+--------------+
 | UART                          | **Yes**   | **Yes**         | **Yes**      | **Yes**     | **Yes**    | **Yes**     | **Yes**      |
 +-------------------------------+-----------+-----------------+--------------+-------------+------------+-------------+--------------+
@@ -105,6 +106,7 @@
    odroid-c2
    odroid-c4
    odroid-n2
+   odroid-go-ultra
    p200
    p201
    p212