Add "discard" mount option for data and cache partition.
Change-Id: I6bf4a1a81108d80f2fd70476484815d19ebacc95
diff --git a/fstab.grouper b/fstab.grouper
index f0b54e6..be98dcb 100644
--- a/fstab.grouper
+++ b/fstab.grouper
@@ -5,6 +5,6 @@
/dev/block/platform/sdhci-tegra.3/by-name/APP /system ext4 ro wait
-/dev/block/platform/sdhci-tegra.3/by-name/CAC /cache ext4 noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait
-/dev/block/platform/sdhci-tegra.3/by-name/UDA /data ext4 noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait,encryptable=/dev/block/platform/sdhci-tegra.3/by-name/MDA
+/dev/block/platform/sdhci-tegra.3/by-name/CAC /cache ext4 discard,noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait
+/dev/block/platform/sdhci-tegra.3/by-name/UDA /data ext4 discard,noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait,encryptable=/dev/block/platform/sdhci-tegra.3/by-name/MDA