media: atomisp: isys_init: Initiate atomisp in a generic manner

The original implementation distinguishes and initiates atomisp during
compiler time. This commit allows isys_init to initiate isys for both types
of atomisp in a generic manner.

Link: https://lore.kernel.org/r/20230713100231.308923-12-hpa@redhat.com



Signed-off-by: Kate Hsuan <hpa@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>