Remove kernel backup space

firmware/lib/include/rollback_index.h

 /* 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.
  *
  * Functions for querying, manipulating and locking rollback indices
  * stored in the TPM NVRAM.
  */
 
 #ifndef VBOOT_REFERENCE_ROLLBACK_INDEX_H_
 #define VBOOT_REFERENCE_ROLLBACK_INDEX_H_
@@ skipping 30 matching lines @@
  * from the backup copy. */
 #define FLAG_KERNEL_SPACE_USE_BACKUP 0x02
 
 #define ROLLBACK_SPACE_FIRMWARE_VERSION 1
 /* Firmware space - FIRMWARE_NV_INDEX, locked with global lock. */
 typedef struct RollbackSpaceFirmware {
   uint8_t  struct_version;  /* Struct version, for backwards compatibility */
   uint8_t  flags;           /* Flags (see FLAG_* above) */
   uint32_t fw_versions;     /* Firmware versions */
   uint32_t reserved;            /* Reserved for future expansion */
-  RollbackSpaceKernel kernel_backup;  /* Backup of kernel space */
 } __attribute__((packed)) RollbackSpaceFirmware;
 
 __pragma(pack(pop)) /* Support packing for MSVC. */
 
 
 /* All functions return TPM_SUCCESS (zero) if successful, non-zero if error */
 
 /*
 
 Call from LoadFirmware()
@@ skipping 51 matching lines @@
 
 /* Lock must be called.  Internally, it's ignored in recovery mode. */
 uint32_t RollbackKernelLock(void);
 
 /* The following functions are here for testing only. */
 
 /* Issue a TPM_Clear and reenable/reactivate the TPM. */
 uint32_t TPMClearAndReenable(void);
 
 #endif  /* VBOOT_REFERENCE_ROLLBACK_INDEX_H_ */