[helpers] add new device script

Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>
[mako] autogenerated patterns

Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>
[helpers] refactor adder script

Change-Id: I4c021122c7b82ec799e24a09b37ff76b59101ff8
Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>