faft: Add delay constant for Link

BUG=chromium-os:34392
TEST=Run FAFT suite and pass.

Change-Id: I0ad44a54de410091e4f03b162da3ec1477d8873d
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/37002
diff --git a/server/cros/faft_delay_constants.py b/server/cros/faft_delay_constants.py
index be1b98c..ab0bba8 100644
--- a/server/cros/faft_delay_constants.py
+++ b/server/cros/faft_delay_constants.py
@@ -55,4 +55,7 @@
 
         # Add the platform-specific delay values here.
 
+        if platform == 'Link':
+            self.firmware_screen = 7
+
         pass