Add a flattened device tree (fdt) command (2 of 2)

Modifications to the existing code to support the new fdt command.
diff --git a/common/Makefile b/common/Makefile
index 6f81c4a..74a6af2 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -32,7 +32,7 @@
 	  cmd_cache.o cmd_console.o \
 	  cmd_date.o cmd_dcr.o cmd_diag.o cmd_display.o cmd_doc.o cmd_dtt.o \
 	  cmd_eeprom.o cmd_elf.o cmd_ext2.o \
-	  cmd_fat.o cmd_fdc.o cmd_fdos.o cmd_flash.o cmd_fpga.o \
+	  cmd_fat.o cmd_fdc.o cmd_fdt.o cmd_fdos.o cmd_flash.o cmd_fpga.o \
 	  cmd_i2c.o cmd_ide.o cmd_immap.o cmd_itest.o cmd_jffs2.o \
 	  cmd_load.o cmd_log.o \
 	  cmd_mem.o cmd_mii.o cmd_misc.o cmd_mmc.o \