Add support for CHNV settings to crossystem.

crossystem can now be used in place of reboot_mode.

BUG=12327
TEST=manual by comparing with the old reboot_mode utility

crossystem recovery_request=1
reboot_mode
crossystem dbg_reset=1
reboot_mode
crossystem fwb_tries=1
reboot_mode

crossystem recovery_request=0
reboot_mode
crossystem dbg_reset=0
reboot_mode
crossystem fwb_tries=0
reboot_mode

Review URL: http://codereview.chromium.org/6538066

Change-Id: Ifde661d4621129d52e757654d85e386e65f90df5
diff --git a/utility/crossystem_main.c b/utility/crossystem_main.c
index d6e0b8b..7a1c1b5 100644
--- a/utility/crossystem_main.c
+++ b/utility/crossystem_main.c
@@ -32,6 +32,11 @@
   {"hwid", 1, 0, "Hardware ID"},
   {"fwid", 1, 0, "Active firmware ID"},
   {"ro_fwid", 1, 0, "Read-only firmware ID"},
+  /* Writable integers */
+  {"recovery_request", 0, 1, "Recovery mode request (writable)"},
+  {"dbg_reset", 0, 1, "Debug reset mode request (writable)"},
+  {"fwb_tries", 0, 1, "Try firmware B count (writable)"},
+
   /* Terminate with null name */
   {NULL, 0, 0, NULL}
 };