Support 22 kHz tone control for lnbp21 and lnbh24.
(Overrides the 'set_tone' hook of the frontend driver.)
Signed-off-by: NOliver Endriss <o.endriss@gmx.de>
Acked-by: NManu Abraham <manu@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>