nvmem: imx-ocotp: add support for imx8mq

The i.MX8MQ uses the same OCOTP block as the i.MX7D, but with
fourfold increase in fuse banks.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>