[media] go7007: Fix the TW2804 I2C type name

The TW2804 I2C sub-device type name was incorrectly set to wis_twTW2804
for the adlink mpg24 board. Rename it to wis_tw2804.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>