Fix a broken/missing documentation at sound

After running ./scripts/documentation-file-ref-check I noticed that it was complaining about the lack of a MultiSound file that used to be inside the old OSS sound system.

That's actually a script, with seems to be needed in order to make the multisound driver to work. Also, it contains some instructions about how to use the module.

Granted, this is old ISA stuff, but, as long as the driver remains in Kernel, it probably makes sense to keep the script somewhere.

So, this patch restores the file from the git log, moving it to an existing directory and updates the module names.

It also fixes the script, as it has some issues that prevents it to work with modern distributions (basically, include stuff at C files it produces).

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Please notice that I don't have such hardware to test. So, I have no means to know if the produced exec file still makes sense.

Mauro Carvalho Chehab (4):
sound: restore MultiSound script
alsa: multisound.sh: fix script to make it build with modern tools
alsa: multisound.sh: update module namespace
alsa: Fix references to Documentation/.*/MultiSound

 Documentation/sound/alsa-configuration.rst |    2 +-
 Documentation/sound/cards/multisound.sh    | 1139 ++++++++++++++++++++
 sound/isa/Kconfig                          |    2 +-
 3 files changed, 1141 insertions(+), 2 deletions(-)
 create mode 100755 Documentation/sound/cards/multisound.sh

2.17.1