LICENSES: adopt Linux-like LICENSES directory structure ...

At the moment
  grep -r --exclude-dir=.git 'SPDX-License-Identifier:' | \
    grep -v 'GPL-2.0'

shows me 39 non-dually-licensed source code files (SoCFPGA) that have a
BSD-3-Clause license _identifier_.
There seems to be no barebox BSD-3-Clause license  _text_ however,
which runs afoul of the first clause of the license.

To account for this and future contributions which are licensed under
non-GPL-2.0-but-compatible licenses, create a new LICENSES directory
like the one Linux has, where licenses are located.

This also removes the jumptable exception inherited from U-Boot:

  > On 11/2/19 09:00, Sascha Hauer wrote:
  >> I don't think we need this [exception]. barebox doesn't have
  >> (and never had since the fork from U-Boot) these standalone
  >> applications. There is no jumptable in barebox. What we do have
  >> is modules support, but these are not covered by this text.

The LICENSES/exceptions directory is therefore empty as well as
the LICENSES/other directory, which might house new licenses in future.
They are added along this commit however, because upstream
checkpatch.pl introduced with a later commit depends on their
existence.

Fixes: a3ffa97f4 ("rename U-Boot-v2 project to barebox")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

rename U-Boot-v2 project to barebox ...

This has been done with the following script:

find -path ./.git -prune -o -type f -print0 | xargs -0 -r sed -i \
	-e 's/u2boot/barebox/g' \
	-e 's/U2Boot/barebox/g' \
	-e 's/U-boot V2/barebox/g' \
	-e 's/u-boot v2/barebox/g' \
	-e 's/U-Boot V2/barebox/g' \
	-e 's/U-Boot-v2/barebox/g' \
	-e 's/U_BOOT/BAREBOX/g' \
	-e 's/UBOOT/BAREBOX/g' \
	-e 's/uboot/barebox/g' \
	-e 's/u-boot/barebox/g' \
	-e 's/u_boot/barebox/g' \
	-e 's/U-Boot/barebox/g' \
	-e 's/U-boot/barebox/g' \
	-e 's/U-BOOT/barebox/g'

find -path ./.git -prune -o \( -name "*u-boot*" -o -name "*uboot*" -o -name "*u_boot*" \) -print0 | \
	xargs -0 -r rename 's/u[-_]?boot/barebox/'

It needs some manual fixup following in the next patch

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Allow use of include/image.h and include/asm-*/u-boot.h in proprietary code. ...

The COPYING file was extended to make clear that these files can be
used in non-GPL code, too.

* Add comment about non-GPL character of standalone applications to ...

COPYING file

* Fix FEC ethernet problem on NSCU board.

Initial revision