V4L/DVB (9226): MFE: cx88: Reset cx22702 on hvr-3000/4000

The cx22702 is now always reset on module load. Prior to
this the cx22702 was not found on i2c scan without a
full reset.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>