stm32mp1: add support for stm32mp157c-ev1 board

Add support of stm32mp157c-ev1, the evaluation board with pmic stpmu1
(ev1 = mother board + daughter ed1) with device tree.
EV1 is the selected board by default in basic defconfig.

PS: CONFIG_PINCTRL_FULL activation avoid to increase
    SYS_MALLOC_F_LEN (Early malloc usage: 2034)

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/dts/stm32mp157c-ev1-u-boot.dtsi b/arch/arm/dts/stm32mp157c-ev1-u-boot.dtsi
new file mode 100644
index 0000000..2f4de3a
--- /dev/null
+++ b/arch/arm/dts/stm32mp157c-ev1-u-boot.dtsi
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright : STMicroelectronics 2018
+ */
+
+#include "stm32mp157c-ed1-u-boot.dtsi"
+
+/ {
+	aliases {
+		spi0 = &qspi;
+		i2c1 = &i2c2;
+		i2c4 = &i2c5;
+	};
+};
+
+&flash0 {
+	compatible = "spi-flash";
+};
+
+&flash1 {
+	compatible = "spi-flash";
+};
+
+&v3v3 {
+	regulator-always-on;
+};
+
+/* SPL part **************************************/
+&qspi {
+	u-boot,dm-spl;
+};
+
+&qspi_clk_pins_a {
+	u-boot,dm-spl;
+	pins {
+		u-boot,dm-spl;
+	};
+};
+
+&qspi_bk1_pins_a {
+	u-boot,dm-spl;
+	pins1 {
+		u-boot,dm-spl;
+	};
+	pins2 {
+		u-boot,dm-spl;
+	};
+};
+
+&qspi_bk2_pins_a {
+	u-boot,dm-spl;
+	pins1 {
+		u-boot,dm-spl;
+	};
+	pins2 {
+		u-boot,dm-spl;
+	};
+};
+
+&flash0 {
+	u-boot,dm-spl;
+};