staging: comedi: drivers: fix spelling mistake "to" -> "too"

There is a spelling mistake in a deb_dbg message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200123010344.2834618-1-colin.king@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>