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: do another round of coding style cleanup

Run checkpatch --fix-inline again, in order to get rid
of some additional issues that got introduced (or that
checkpatch can now detect).

This should help preventing receiving random cleanups,
while keeping the code on a better shape.

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

media: atomisp: get rid of memory_access.c

Now that we have everything in place, we can get rid of the
memory_access abstraction layer.

Now, everything related to heterogeneous memory management
(hmm) is under hmm.c & related pools.

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

media: atomisp: get rid of mmgr_load and mmgr_store

Those functions are just wrappers for hmm_load/hmm_store.

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>