stm32mp: add binman support for STM32MP15x

Use binman to add the stm32image header on SPL binary for basic boot
or on U-Boot binary when it is required, i.e. for TF-A boot without FIP
support, when CONFIG_STM32MP15x_STM32IMAGE is activated.

The "binman" tool is the recommended tool for specific image generation.
This patch allows to suppress the config.mk file and it is a preliminary
step to manage FIT generation with binman.

The init_r parsing of U-Boot device tree to search the binman
information is not required for STM32MP15, so the binman library
can be removed in U-Boot (CONFIG_BINMAN_FDT is deactivated).

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/stm32mp15-u-boot.dtsi b/arch/arm/dts/stm32mp15-u-boot.dtsi
index 43a7909..db23d80 100644
--- a/arch/arm/dts/stm32mp15-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15-u-boot.dtsi
@@ -21,6 +21,10 @@
 		pinctrl1 = &pinctrl_z;
 	};
 
+	binman: binman {
+		multiple-images;
+	};
+
 	clocks {
 		u-boot,dm-pre-reloc;
 	};
@@ -228,3 +232,28 @@
 	resets = <&rcc UART8_R>;
 };
 
+#if defined(CONFIG_STM32MP15x_STM32IMAGE)
+&binman {
+	u-boot-stm32 {
+		filename = "u-boot.stm32";
+		mkimage {
+			args = "-T stm32image -a 0xC0100000 -e 0xC0100000";
+			u-boot {
+			};
+		};
+	};
+};
+#endif
+
+#if defined(CONFIG_SPL)
+&binman {
+	spl-stm32 {
+		filename = "u-boot-spl.stm32";
+		mkimage {
+			args = "-T stm32image -a 0x2FFC2500 -e 0x2FFC2500";
+			u-boot-spl {
+			};
+		};
+	};
+};
+#endif