media: dib0700: Only touch one bit when start/stop an adapter

Only touch the right bit to enable/disable an adapter channel,
without touching the other adapter's one.

Tested on Nova-TD.

Link: https://lore.kernel.org/linux-media/4214942f248baddec9cfd2b4b2424993ac356a51.1632689033.git.mchehab+huawei@kernel.org



Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, Mauro Carvalho Chehab <mchehab@kernel.org>, Michael Kuron <michael.kuron@gmail.com>, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, pb@linuxtv.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>