Staging: olpc_dcon: Already completed TODO entry removed

The TODO entry - drop global variables, use a proper olpc_dcon_priv
struct - is already finished. The driver has no global variables.
It uses the private structure 'dcon_priv'.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>
Staging: olpc_dcon: updating MAINTAINERS

Andres Salomon and Chris Ball are not longer at OLPC.
Daniel Drake is the new OLPC go-to guy. And I wanna
also be CC'd on DCON and other OLPC patches.

Signed-off-by: Jens Frederich <jfrederich@gmail.com>