media: staging/intel-ipu3: remove the unnecessary compiler flags

Currently, we can build ipu3 driver code without any
warnings with W=1, so the extra compiler flags in Makefile
and the item in TODO file can be removed.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

staging: add missing SPDX lines to Makefile files

There are a few remaining drivers/staging/*/Makefile files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.

Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

media: ipu3: shut up warnings produced with W=1

There are lots of warnings produced by this driver. It is not
as much as atomisp, but it is still a lot.

So, use the same solution to hide most of them.
Those need to be fixed before promoting it out of staging,
so add it at the TODO list.

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

media: staging/intel-ipu3: Add imgu top level pci device driver

This patch adds support for the Intel IPU v3 as found
on Skylake and Kaby Lake SoCs.

The driver glues v4l2, css(camera sub system) and other
pieces together to perform its functions, it also loads
the IPU3 firmware binary as part of its initialization.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>