u-boot: add an option to generate u-boot-dtb.bin

Signed-off-by: Lionel Flandrin <lionel@svkt.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/uboot/Config.in

@@ -159,6 +159,9 @@ config BR2_TARGET_UBOOT_FORMAT_BIN
 	bool "u-boot.bin"
 	default y
 
+config BR2_TARGET_UBOOT_FORMAT_DTB_BIN
+	bool "u-boot-dtb.bin"
+
 config BR2_TARGET_UBOOT_FORMAT_DTB_IMG
 	bool "u-boot-dtb.img"
 

boot/uboot/uboot.mk

@@ -74,6 +74,11 @@ UBOOT_BINS += u-boot-dtb.img
 UBOOT_MAKE_TARGET += u-boot-dtb.img
 endif
 
+ifeq ($(BR2_TARGET_UBOOT_FORMAT_DTB_BIN),y)
+UBOOT_BINS += u-boot-dtb.bin
+UBOOT_MAKE_TARGET += u-boot-dtb.bin
+endif
+
 ifeq ($(BR2_TARGET_UBOOT_FORMAT_IMG),y)
 UBOOT_BINS += u-boot.img
 UBOOT_MAKE_TARGET += u-boot.img