ARM: dts: stm32: Add support for STM32MP13xx DHCOR SoM and DHSBC board

This stm32mp135f-dhcor-dhsbc board is a stack of DHCOR SoM based on
STM32MP135F SoC (900MHz / crypto capabilities) populated on DHSBC
carrier board.

The SoM contains the following peripherals:
- STPMIC (power delivery)
- 512MB DDR3L memory
- eMMC and SDIO WiFi module

The DHSBC carrier board contains the following peripherals:
- Two RGMII Ethernet ports
- USB-A Host port, USB-C peripheral port, USB-C power supply plug
- Expansion connector

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/dts/stm32mp135f-dhcor-dhsbc-u-boot.dtsi b/arch/arm/dts/stm32mp135f-dhcor-dhsbc-u-boot.dtsi
new file mode 100644
index 0000000..d718aae
--- /dev/null
+++ b/arch/arm/dts/stm32mp135f-dhcor-dhsbc-u-boot.dtsi
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2024 Marek Vasut <marex@denx.de>
+ */
+
+#include "stm32mp13xx-dhcor-u-boot.dtsi"
+
+&uart4 {
+	bootph-all;
+};
+
+&uart4_pins_b {
+	bootph-all;
+
+	pins1 {
+		bootph-all;
+	};
+	pins2 {
+		bootph-all;
+	};
+};
+
+&usbphyc {
+	bootph-all;
+};