Revert "sandbox: move source files from board/ to arch/sandbox/"

This reverts commit 258060905e04fe2eb509756ef3b37e23e220a2d6.

Conflicts:
	boards.cfg

Wrong patch 25806090 was applied by accident. Revert it.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
sandbox: set sandbox's vendor to null

Because sandbox is not a real hardware, setting vendor=sandbox is
almost meaningless.

This commit sets sandbox's vendor field to '-'.

It is a good thing that it decreases one level directory hierarchy.
The files board/sandbox/sandbox/* have been moved to board/sandbox/*.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
patman: Suppress duplicate signoffs only for real patches

There is an unfortunate bug in the signoff suppression logic. The first
pass is performed with 'git log', and all signoffs are added to the
supression set, such that the second time (when processing the real
patches) we always suppress the signoffs.

Correct this by only suppressing signoffs in the second pass.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Tested-by: Andreas Bießmann <andreas.devel@googlemail.com>