fstab: fix data encryption

In /dev/block/platform/msm_sdcc.1/by-name/, there is no metadata partition,
but there is an encrypt partition which is not used otherwise. Use the latter
in fstab.geehrc to store the encryption footer.
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_device_lge_e975 into cm-11.0