sunxi: dts: arm: update devicetree files

Update the devicetree files from the Linux kernel, version v6.0-rc4.
This is covering the 32-bit SoCs, from arch/arm/boot/dts/.

This avoids the not backwards-compatible r_intc binding change, to allow
older kernels to boot, but the other nodes are updated.

Not much change here, the vast majority is actually cosmetic: node names
and using symbolic names for the the RTC clocks.
The R40 boards gain DVFS support.
Some A23/A33 tablet DTs are unified into a single file.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
diff --git a/arch/arm/dts/sun8i-r40-feta40i.dtsi b/arch/arm/dts/sun8i-r40-feta40i.dtsi
index 265e0fa..9f39b5a 100644
--- a/arch/arm/dts/sun8i-r40-feta40i.dtsi
+++ b/arch/arm/dts/sun8i-r40-feta40i.dtsi
@@ -5,6 +5,11 @@
 //  Copyright (C) 2017 Icenowy Zheng <icenowy@aosc.io>
 
 #include "sun8i-r40.dtsi"
+#include "sun8i-r40-cpu-opp.dtsi"
+
+&cpu0 {
+	cpu-supply = <&reg_dcdc2>;
+};
 
 &i2c0 {
 	status = "okay";