arm: rpi: Sync rpi dts files from Linux

Sync these files, obtained from Linux v5.15.

This adds a devicetree file for rpi_4 which was not there before.

Testing shows no change so far as I can see:
- boots to U-Boot prompt on rpi0, rpi2
- boots to distro on rpi3
- boots to distro on rpi4

I am assuming that syncing with Linux is safe, but the maintainer should
know for sure.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/bcm2835.dtsi b/arch/arm/dts/bcm2835.dtsi
index a5c3824..0549686 100644
--- a/arch/arm/dts/bcm2835.dtsi
+++ b/arch/arm/dts/bcm2835.dtsi
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "bcm283x.dtsi"
+#include "bcm2835-common.dtsi"
+#include "bcm2835-rpi-common.dtsi"
 
 / {
 	compatible = "brcm,bcm2835";