Set direncryption USE flag for cave celes and terra

BUG=b:38316853
TEST=None

Change-Id: Id02fd27e97ab8045a96e575a766009bbc86bd786
Reviewed-on: https://chromium-review.googlesource.com/506507
Commit-Ready: Bernie Thompson <bhthompson@chromium.org>
Tested-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Elijah Taylor <elijahtaylor@chromium.org>
(cherry picked from commit cf1c29155e52e3b3a3600c1ac38f061c7def67b4)
Reviewed-on: https://chromium-review.googlesource.com/506622
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Commit-Queue: Bernie Thompson <bhthompson@chromium.org>
diff --git a/overlay-cave/make.conf b/overlay-cave/make.conf
index 4942bd1..04dbf0f 100644
--- a/overlay-cave/make.conf
+++ b/overlay-cave/make.conf
@@ -10,6 +10,8 @@
 
 USE="${USE} arc"
 
+USE="${USE} direncryption"
+
 # Avoid inhibiting the keyboard (which reports events from side buttons).
 USE="${USE} keyboard_includes_side_buttons"
 
diff --git a/overlay-celes/make.conf b/overlay-celes/make.conf
index 74f085c..536b945 100644
--- a/overlay-celes/make.conf
+++ b/overlay-celes/make.conf
@@ -10,4 +10,6 @@
 # NOTE: Deprecating feature. New board should NOT have it.
 USE="${USE} allow_consumer_kiosk"
 
+USE="${USE} direncryption"
+
 EC_FIRMWARE="celes"
diff --git a/overlay-terra/make.conf b/overlay-terra/make.conf
index f1319af..3e83caf 100644
--- a/overlay-terra/make.conf
+++ b/overlay-terra/make.conf
@@ -9,3 +9,5 @@
 USE="${USE} allow_consumer_kiosk"
 
 USE="${USE} arc"
+
+USE="${USE} direncryption"