media: atomisp: move ia_css_configure_sc() implementation

With the changes, this function is now undefined if built
for ISP2400. So, move its implementation to the file which
calls it.

Reported-by: Francescodario Cuzzocrea <francescodario.cuzzocrea@mail.polimi.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>