faft: Remove ec_reboot_cmd delay

The current usage of ec_reboot_cmd delay is a duration between EC power-on
and some interaction via EC console. The ec_boot_to_console delay serves
the same purpose. So reuse the ec_boot_to_console delay.

BUG=chromium-os:35792
TEST=run_remote_tests.sh --board link --remote dut TryFwB/control.ec_wp

Change-Id: Icc5ca9efa3b13781f37a2b60b2f7e119216c599d
Reviewed-on: https://gerrit.chromium.org/gerrit/39580
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
diff --git a/server/cros/faftsequence.py b/server/cros/faftsequence.py
index 224258a..1e6d1b1 100644
--- a/server/cros/faftsequence.py
+++ b/server/cros/faftsequence.py
@@ -987,7 +987,7 @@
         else:
             self.servo.enable_recovery_mode()
             self.cold_reboot()
-            time.sleep(self.delay.ec_reboot_cmd)
+            time.sleep(self.delay.ec_boot_to_console)
             self.servo.disable_recovery_mode()
 
 
@@ -1190,7 +1190,7 @@
         self.faft_client.system.run_shell_command('sync')
         time.sleep(self.delay.sync)
         self.ec.reboot(flags)
-        time.sleep(self.delay.ec_reboot_cmd)
+        time.sleep(self.delay.ec_boot_to_console)
         self.check_lid_and_power_on()