Reserve boot-time-monitor cmd on 18-20

The implementation is delayed and still work in progress. It is being
used for testing internally and needs to be reserved to make sure it
doesn't break later on.

Change-Id: I7145fc9299e06b129d5a22381d520bbfad674499
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/commands.hpp b/commands.hpp
index 41494e3..cc22a23 100644
--- a/commands.hpp
+++ b/commands.hpp
@@ -57,10 +57,16 @@
     SysGetBmcMode = 16,
     // The Sys Linux Boot Done command
     SysLinuxBootDone = 17,
+    // Send reboot checkpoint to BMC to monitor the reboot process.
+    SysSendRebootCheckpoint = 18,
+    // Send reboot end event to BMC to notify BMC the reboot is completed.
+    SysSendRebootComplete = 19,
+    // Send Additional duration to BMC to monitor the reboot process.
+    SysSendRebootAdditionalDuration = 20,
     // Google CustomAccel Get VR Settings
-    SysGetAccelVrSettings = 18,
+    SysGetAccelVrSettings = 21,
     // Google CustomAccel Set VR Settings
-    SysSetAccelVrSettings = 19,
+    SysSetAccelVrSettings = 22,
 };
 
 } // namespace ipmi