Fix stupid wrong-stride bug.

utility/dump_fmap.c

 /*
  * Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 159 matching lines @@
   }
   close(fd);                            /* done with this now */
 
   s = (char *)base_of_rom;
   for (i=0; i<sb.st_size; i += FMAP_SEARCH_STRIDE) {
     if (0 == strncmp(s, "__FMAP__", 8)) {
       printf("hit at 0x%08x\n", (uint32_t)i);
       retval = dump_fmap(s);
       break;
     }
-    s++;
+    s += FMAP_SEARCH_STRIDE;
   }
 
   if (0 != munmap(base_of_rom, sb.st_size)) {
     fprintf(stderr, "%s: can't munmap %s: %s\n",
             progname,
             argv[optind],
             strerror(errno));
     return 1;
   }
 
   return retval;
 }