Enable hardware backed disk encryption

b/17475056 Enable hardware crypto for userdata encryption

Change-Id: I9812861aec113a8ed4fb71c23423fd2f64f77984
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