u-boot: add option for Freescale u-boot.imx format

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

boot/uboot/Config.in

@@ -87,6 +87,9 @@ config BR2_TARGET_UBOOT_FORMAT_BIN
 config BR2_TARGET_UBOOT_FORMAT_IMG
 	bool "u-boot.img"
 
+config BR2_TARGET_UBOOT_FORMAT_IMX
+	bool "u-boot.imx"
+
 config BR2_TARGET_UBOOT_FORMAT_NAND_BIN
 	bool "u-boot-nand.bin"
 

boot/uboot/uboot.mk

@@ -40,6 +40,8 @@ else ifeq ($(BR2_TARGET_UBOOT_FORMAT_NAND_BIN),y)
 UBOOT_BIN          = u-boot-nand.bin
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_IMG),y)
 UBOOT_BIN          = u-boot.img
+else ifeq ($(BR2_TARGET_UBOOT_FORMAT_IMX),y)
+UBOOT_BIN          = u-boot.imx
 else ifeq ($(BR2_TARGET_UBOOT_FORMAT_SB),y)
 UBOOT_BIN          = u-boot.sb
 UBOOT_MAKE_TARGET  = $(UBOOT_BIN)