GTA04 board file removed since it was last tests/working in 3.13 and DT is now working well enough so that we never have to switch back

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
fix poweroff (compatible entry in driver was renamed but not documented)

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>