Cleanup and preparation for inside-wrapper TPM refactoring.

Add recovery reason for already in recovery and need to reboot to
recovery to let the TPM init.

Add vboot_struct fields.

Fix type for keyblock flags param to SetTPMBootModeState().

BUG=none
TEST=make && make runtests

Change-Id: I4035bdb377aaebaca03a43799be57977166da739
Reviewed-on: http://gerrit.chromium.org/gerrit/4599
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>

firmware/lib/mocked_tpm_bootmode.c

@@ -11,6 +11,6 @@
 
 
 uint32_t SetTPMBootModeState(int developer_mode, int recovery_mode,
-                             int fw_keyblock_flags) {
+                             uint64_t fw_keyblock_flags) {
   return TPM_SUCCESS;
 }