DVB (2432): LNB power can now be switched off for Activy Budget-S rev GR/AL.

- LNB power can now be switched off for Activy Budget-S rev GR/AL.
Dishnetwork support fixed for Nova-S with bsbe1/lnbp21 frontend and
Activy Budget-S rev AL.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>