staging: fix typos "selct" -> "select"

This patch was generated by

	git grep -E -i -l 's(le|el)ct' drivers/staging | xargs -r perl -p -i -e 's/([Ss])(le|el)ct/$1elect/'

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