[media] rtl28xxu: add ID [0bda:2832] Realtek RTL2832U reference design

Also change location of other RTL2832 reference design ID 0bda:2838.
I just like to see reference design IDs at the first IDs in the list.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>