cuboxi-common: update environment

. update init
. remove unused stuff
. move wlan and bt binaries to vendor
. fix code style
. change kernel path
. update init file name to real one used
. add init.d script to load wlan modules
. update common overlay
. add bluetooth vendor config
. etc

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I5389adc0954d9459fa818c92bef8f3d12f5ed859