ARM: meson: odroid-go-ultra: setup PMIC regulators are board init

The Odroid Go Ultra has 2 chained PMICs RK818 and RK818, and needs
an adjustment on the BUCK and LDO values.

Add the initial regulators values in -u-boot.dtsi & run the initial
regulator setup in a new odroid-go-ultra board.

Proper OTG and BOOST regulators are still missing to have USB-A
host properly working.

Link: https://lore.kernel.org/r/20230210-u-boot-odroid-go-ultra-pmics-setup-v1-1-1f16d62b76af@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/board/amlogic/odroid-go-ultra/Makefile b/board/amlogic/odroid-go-ultra/Makefile
new file mode 100644
index 0000000..8ebaa0c
--- /dev/null
+++ b/board/amlogic/odroid-go-ultra/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2023 Neil Armstrong <neil.armstrong@linaro.org>
+
+obj-y	:= odroid-go-ultra.o