trivial: fix typos s/paramter/parameter/ and s/excute/execute/ in documentation and source comments.
Signed-off-by: NMartin Olsson <martin@minimum.se>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Signed-off-by: NJochen Friedrich <jochen@scram.de>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>