media: atomisp: asc.acc.pipeline is always NULL

With the removal of the ACC ioctls and atomisp_acc.c asc.acc.pipeline
never gets set, so it is always NULL.

Remove asc.acc.pipeline and drop checks for it being NULL / !NULL.

Link: https://lore.kernel.org/linux-media/20220615205037.16549-22-hdegoede@redhat.com


Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>