media: atomisp: Drop ia_css_debug_dump_debug_info() and functions only used by it

ia_css_debug_dump_debug_info() is defined but never called anywhere,
drop it.

Also drop all the other ia_css_debug_dump_* functions only called by
ia_css_debug_dump_debug_info(), as well as *_get_state() functions only
used by those.

Link: https://lore.kernel.org/r/20230812133523.355581-1-hdegoede@redhat.com

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

media: atomisp: add SPDX headers

This driver is licensed under GPL 2.0, as stated inside their
headers.

Add the proper tag there. We should probably latter cleanup
the reduntant licensing text, but this could be done later,
after we get rid of other abstraction layers.

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

media: atomisp: cleanup directory hierarchy

This driver has very long directories without a good
reason (IMHO). Let's drop two directories from such hierarchy,
in order to simplify things a little bit and make the dir
output a bit more readable.

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