cbfstool: Use cbfs_image API for "print" command.

Process CBFS ROM image by new cbfs_image API.
To verify, run "cbfstool coreboot.rom print -v" and compare with old cbfstool.

Change-Id: I3a5a9ef176596d825e6cdba28a8ad732f69f5600
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/2206
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

util/cbfstool/cbfs.h

@@ -108,6 +108,7 @@ struct cbfs_payload {
 #define CBFS_COMPONENT_NULL 0xFFFFFFFF
 
 int cbfs_file_header(unsigned long physaddr);
+#define CBFS_NAME(_c) (((char *) (_c)) + sizeof(struct cbfs_file))
 #define CBFS_SUBHEADER(_p) ( (void *) ((((uint8_t *) (_p)) + ntohl((_p)->offset))) )
 
 struct cbfs_file *cbfs_create_empty_file(uint32_t physaddr, uint32_t size);