tuna: set fast charge path

Change-Id: Ic763f131c8a6f336cb336b2bb2dd42900436d3b5
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Allow User select Tablet Mode

Device overlay variables for tablet mode on Tuna.

Needs other Tablet UI commits.

Change-Id: I5529c884b54e2907ec762ee00d6cb94149d6b7df
Signed-off-by: Zaphod <mwilson@acesappraisal.com>