Two separate state structs are defined for different devices inside the
dw2102. Combine them, as both only contain one element.

This will also make it easier to further cleanup the driver.
Signed-off-by: NOlli Salonen <olli.salonen@iki.fi>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>