backports: disable DVB_RTL2832 and DVB_USB_RTL28XXU

backports: disable DVB_RTL2832 and DVB_USB_RTL28XXU

Commit bcf43393 as of linux-next next-20140320 added this Makefile
header extension:

ccflags-y += -I$(srctree)/drivers/staging/media/rtl2832u_sdr

This ends up calling a staging exported symbol rtl2832_sdr_attach().
Let's not pollute driver code with staging code or dependencies.

Folks, can this be cleaned up? This sets a precedent for doing more
of this, and this can get hairy. Its also not fair for folks who
don't want to carry over any staging code. This forces them to, and
its not just a header file, its a full exported symbol. What about
synchronization with differen trees? Was this addressed with Greg?

commit bcf43393579e3d4069e75a9200a87703185bcf11
Author: Antti Palosaari <crope@iki.fi>
Date:   Tue Sep 10 00:13:57 2013 -0300

    [media] rtl28xxu: attach SDR extension module

    With that extension module it supports SDR.

    Signed-off-by: Antti Palosaari <crope@iki.fi>
    Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>