Staging: go7007: fix up some remaining go->dev issues

Staging: go7007: fix up some remaining go->dev issues

This fixes up the remaining "dev is used before it is set" issues in the
go7007 driver that were originally caused by commit
6231a798d441fc40a2b6a53e441d7d230866796f but not fixed up by reverting
it due to other patches later on adding these "fixes".

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>