The syscall pages are written to be used also as man-pages.

However, they don't match the format used by kernel-doc
generated pages from DocBook. Rewrite them to match it.

One side effect is that now all such pages at the book
will have the same format, reducing the format differences
between DVB and the other parts of the book.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Let's remove bad whitespaces on the entire book.

That helps to avoid mixing whitespace removal with other
patches.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

When we wrote the media controller's section, we re-used the
V4L, just because we were lazy to create a brand new DocBook.

Yet, it is a little ackward to have it mixed with V4L. So,
move it to its own directory, in order to have it better
organized.

No functional changes.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>