[media] rtl2832_sdr: put complex U16 format behind module parameter

Move emulated format behind module parameter as those are not
supported. Format conversions will be on library eventually.

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

diff --cc drivers/media/dvb-frontends/rtl2832_sdr.c
Simple merge