Use VbSharedData instead of VbNvStorage for fwb_tries and kernkey_vfy

firmware/lib/vboot_firmware.c

 /* Copyright (c) 2011 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.
  *
  * High-level firmware API for loading and verifying rewritable firmware.
  * (Firmware portion)
  */
 
 #include "gbb_header.h"
 #include "load_firmware_fw.h"
@@ skipping 116 matching lines @@
   shared->fw_version_tpm_start = tpm_version;
   shared->fw_version_tpm = tpm_version;
   VBPERFEND("VB_TPMI");
 
   /* Read try-b count and decrement if necessary */
   VbNvGet(vnc, VBNV_TRY_B_COUNT, &try_b_count);
   if (0 != try_b_count) {
     VbNvSet(vnc, VBNV_TRY_B_COUNT, try_b_count - 1);
     shared->flags |= VBSD_FWB_TRIED;
   }
-  VbNvSet(vnc, VBNV_TRIED_FIRMWARE_B, try_b_count ? 1 : 0);
 
   /* Allocate our internal data */
   lfi = (VbLoadFirmwareInternal*)Malloc(sizeof(VbLoadFirmwareInternal));
   if (!lfi)
     return LOAD_FIRMWARE_RECOVERY;
 
   params->load_firmware_internal = (uint8_t*)lfi;
 
   /* Loop over indices */
   for (i = 0; i < 2; i++) {
@@ skipping 250 matching lines @@
   uint32_t status = RollbackS3Resume();
 
   /* If we can't resume, just do a full reboot.  No need to go to recovery
    * mode here, since if the TPM is really broken we'll catch it on the
    * next boot. */
   if (status == TPM_SUCCESS)
     return LOAD_FIRMWARE_SUCCESS;
   else
     return LOAD_FIRMWARE_REBOOT;
 }