[new uImage] Rename and move print_image_hdr() routine

board/mpl/common/common_util.c

common/cmd_bootm.c

common/cmd_doc.c

common/cmd_fdc.c

common/cmd_ide.c

common/cmd_nand.c

common/cmd_scsi.c

common/cmd_usb.c

common/cmd_ximg.c

common/image.c

include/common.h

include/image.h

lib_ppc/bootm.c