Staging: fix typos "man[ae]g?ment" -> "management"

This patch was generated by running

	git grep -E -l 'man[ae]g?ment' drivers/staging | xargs -r perl -p -i -e 's/\bman[ae]g?ment\b/management/g'

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>