Use helper function to get driver private data from CEC
adapter.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Kamil Debski <kamil@wypas.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>