media: atomisp: css_2401_system: Remove #ifdef ISP2401 to make the driver generic

Removed #if defined(2401) to make the driver generic.

Link: https://lore.kernel.org/r/20230713100231.308923-5-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>