media: atomisp: sh_css: Remove #ifdef ISP2401

The actions of ISP2401 and 2400 are determined at the runtime.

Link: https://lore.kernel.org/r/20230508062632.34537-1-hpa@redhat.comSigned-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>