platform/chrome: cros_ec: Fix spelling mistake "responsed" -> "response"

There are spelling mistakes in dev_warn messages. Fix them.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210925171743.173219-1-colin.king@canonical.com