Add LoadFirmware() support for NvStorage API

firmware/include/load_firmware_fw.h

Index: firmware/include/load_firmware_fw.h
diff --git a/firmware/include/load_firmware_fw.h b/firmware/include/load_firmware_fw.h
index 76fa9904016c77687f10791d02b977d5774ed879..2a895e0bcc8f0e2d6fb9b446de60266cec749ef3 100644
--- a/firmware/include/load_firmware_fw.h
+++ b/firmware/include/load_firmware_fw.h
@@ -19,10 +19,10 @@
 
 /* Return codes for LoadFirmware() and S3Resume(). */
 #define LOAD_FIRMWARE_SUCCESS 0   /* Success */
-#define LOAD_FIRMWARE_RECOVERY 1  /* Reboot to recovery mode */
+#define LOAD_FIRMWARE_RECOVERY 1  /* Reboot to recovery mode.  The specific
+                                   * recovery reason has been set in
+                                   * VbNvContext (VBNV_RECOVERY_REQUEST). */
 #define LOAD_FIRMWARE_REBOOT 2    /* Reboot to same mode as current boot */
-#define LOAD_FIRMWARE_RECOVERY_TPM 3  /* Reboot to recovery mode due
-                                       * to TPM error */
 
 /* Boot flags for LoadFirmware().boot_flags */
 #define BOOT_FLAG_DEVELOPER UINT64_C(0x01)  /* Developer switch is on */
@@ -82,6 +82,12 @@ int GetFirmwareBody(LoadFirmwareParams* params, uint64_t firmware_index);
 
 /* Functions provided by verified boot library to PEI */
 
+/* Early setup for LoadFirmware().  This should be called as soon as the TPM
+ * is available in the boot process.
+ *
+ * Returns LOAD_FIRMWARE_SUCCESS if successful, error code on failure. */
+int LoadFirmwareSetup(void);
+
 /* Attempts to load the rewritable firmware.
  *
  * Returns LOAD_FIRMWARE_SUCCESS if successful, error code on failure. */