Merge tag 'u-boot-amlogic-20220427' of https://source.denx.de/u-boot/custodians/u-boot-amlogic

- Add AXG support for SARADC, including minimal ao-clk driver
- Update Amlogic documentation for Matrix & Jethub D1

arch/arm/dts/meson-axg-jethome-jethub-j100-u-boot.dtsi

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Vyacheslav Bocharov <adeep@lexina.in>
+ * Author: Vyacheslav Bocharov <adeep@lexina.in>
+ */
+
+&saradc {
+	status = "okay";
+	vref-supply = <&vddio_ao18>;
+};