[media] stv090x: 22kHz workaround must also be performed for the 2nd frontend

22kHz workaround must also be performed for the 2nd frontend.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>