p1: add lvm support [3]

add back /data to onenand
add lvm for system and data
increase /system to 800M
used aries/crespo devices as example

Dependencies:

1. https://gerrit.omnirom.org/#/c/6959/ 
2. https://gerrit.omnirom.org/#/c/6960/ 

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I65820a12b53c338a8f8b4a2d6910c029c6134ae6