Previously, there was no indication to the user that a FIT image was
successfully created after executing mkimage.  For example:

  $ mkimage -f uImage.its uImage.itb
  DTC: dts->dtb  on file "uImage.its"

Adding some additional output after creating a FIT image lets the user
know exactly what is contained in their image, eg:

  $ mkimage -f uImage.its uImage.itb
  DTC: dts->dtb  on file "uImage.its"
  FIT description: Linux kernel 2.6.32-rc7-00201-g7550d6f-dirty
  Created:         Tue Nov 24 15:43:01 2009
   Image 0 (kernel@1)
    Description:  Linux Kernel 2.6.32-rc7-00201-g7550d6f-dirty
    Type:         Kernel Image
    Compression:  gzip compressed
    Data Size:    2707311 Bytes = 2643.86 kB = 2.58 MB
    Architecture: PowerPC
    OS:           Linux
    Load Address: 0x00000000
    Entry Point:  0x00000000
    Hash algo:    crc32
    Hash value:   efe0798b
    Hash algo:    sha1
    Hash value:   ecafba8c95684f2c8fec67e33c41ec88df1534d7
   Image 1 (fdt@1)
    Description:  Flattened Device Tree blob
    Type:         Flat Device Tree
    Compression:  uncompressed
    Data Size:    12288 Bytes = 12.00 kB = 0.01 MB
    Architecture: PowerPC
    Hash algo:    crc32
    Hash value:   a5cab676
    Hash algo:    sha1
    Hash value:   168722b13e305283cfd6603dfe8248cc329adea6
   Default Configuration: 'config@1'
   Configuration 0 (config@1)
    Description:  Default Linux kernel
    Kernel:       kernel@1
    FDT:          fdt@1

This brings the behavior of creating a FIT image in line with creating a
standard uImage, which also prints out the uImage contents after
creation.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>