media: atomisp: de-duplicate names at *_input_system_global.h

There are some duplicated names between the ISP2401 and ISP2400
for the input system, with different meanings.

In order to avoid ubiquity, let's prepend those with the
name of the ISP.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>