docs: rSTify ppc-spapr-hotplug.txt.
While working on this file, also removed and unused reference in the end of the file. The reference in the text was removed by commit
9f992cca93d (spapr: update spapr hotplug documentation), but the link in the end of the document was not removed then.
Signed-off-by: Leonardo Garcia <lagarcia@br.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <
50ed30232e0e6eafb580c17adec3fba17b873014.
1641995058.git.lagarcia@br.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>