Docs/admin: alphabetize some kernel-parameters (part 1)

Move some out-of-place kernel parameters into their correct
locations.

Move one out-of-order keyword/legend in kernel-parameters.rst.

Add some missing keyword legends in kernel-parameters.rst:
  HIBERNATION HYPER_V
and drop some obsolete/removed keyword legends:
 EIDE IOSCHED OSS TS XT

Correct the location of the setup.h file.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>