The IPMI is under drivers/char. This doc describes the kAPI
part of the IPMI (mainly).

So, move it to the driver-api directory and add it to the
corresponding index.rst file.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/ae4edbc6753dc522cb93de36800978e3b58e0cfb.1588345503.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>