ARM: dts: stm32: Add STM32MP257F Evaluation board support

Add STM32MP257F Evaluation board support. It embeds a STM32MP257FAI SoC,
with 4GB of DDR4, TSN switch (2+1 ports), 2*USB typeA, 1*USB2 typeC,
SNOR OctoSPI, mini PCIe, STPMIC2 for power distribution ...

Sync device tree with kernel v6.6-rc1.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/arch/arm/dts/stm32mp25xxak-pinctrl.dtsi b/arch/arm/dts/stm32mp25xxak-pinctrl.dtsi
new file mode 100644
index 0000000..2e0d4d3
--- /dev/null
+++ b/arch/arm/dts/stm32mp25xxak-pinctrl.dtsi
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+&pinctrl {
+	st,package = <STM32MP_PKG_AK>;
+
+	gpioa: gpio@44240000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 0 16>;
+	};
+
+	gpiob: gpio@44250000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 16 16>;
+	};
+
+	gpioc: gpio@44260000 {
+		status = "okay";
+		ngpios = <14>;
+		gpio-ranges = <&pinctrl 0 32 14>;
+	};
+
+	gpiod: gpio@44270000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 48 16>;
+	};
+
+	gpioe: gpio@44280000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 64 16>;
+	};
+
+	gpiof: gpio@44290000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 80 16>;
+	};
+
+	gpiog: gpio@442a0000 {
+		status = "okay";
+		ngpios = <16>;
+		gpio-ranges = <&pinctrl 0 96 16>;
+	};
+
+	gpioh: gpio@442b0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 2 114 12>;
+	};
+
+	gpioi: gpio@442c0000 {
+		status = "okay";
+		ngpios = <12>;
+		gpio-ranges = <&pinctrl 0 128 12>;
+	};
+};
+
+&pinctrl_z {
+	gpioz: gpio@46200000 {
+		status = "okay";
+		ngpios = <10>;
+		gpio-ranges = <&pinctrl_z 0 400 10>;
+	};
+};