[media] msi3101: add stream format 336 I+Q pairs per frame

That one seem to have 12-bit resolution. Use it for streams that
has sampling rate 6 <= rate (Msps) < 8, between 6 and 8Msps.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>