dfu:cmd: Support for DFU u-boot command

Support for u-boot's command line command "dfu <interface> <dev> [list]".

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
diff --git a/common/Makefile b/common/Makefile
index 3d62775..57da76f 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -184,6 +184,7 @@
 COBJS-$(CONFIG_MODEM_SUPPORT) += modem.o
 COBJS-$(CONFIG_UPDATE_TFTP) += update.o
 COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
+COBJS-$(CONFIG_CMD_DFU) += cmd_dfu.o
 endif
 
 ifdef CONFIG_SPL_BUILD