achievement unlocked: revert the revert for great justice.

Revert "Revert "Enable hardware backed disk encryption""

This reverts commit a64ea57afd05b270acfe8f7cba44c4cc9cd255ba.

Change-Id: I0bff9728e1e444d063918056bda6347eacda1f96
diff --git a/BoardConfig.mk b/BoardConfig.mk
index b62a927..1da1a06 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -78,7 +78,7 @@
 VSYNC_EVENT_PHASE_OFFSET_NS := 7500000
 SF_VSYNC_EVENT_PHASE_OFFSET_NS := 5000000
 TARGET_USES_ION := true
-TARGET_HW_DISK_ENCRYPTION := false
+TARGET_HW_DISK_ENCRYPTION := true
 TARGET_CRYPTFS_HW_PATH := device/moto/shamu/cryptfs_hw
 
 # Enable dex-preoptimization to speed up first boot sequence