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
43039faba8e6bd7dd472a775570c3b284a2cc702 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>