boards: mimxrt700_evk: Enable NS & NP GPIO0 access

Enable the GPIO0 peripheral regardless of DT status. Program the
peripheral to allow non-secured and non-privileged accesses.

This is to enable access to the GPIO0 peripheral (both port reads/writes
and interrupts) from the mimxrt798s/hifi4 domain, as that domain is
non-privileged.

Signed-off-by: Vit Stanicek <vit.stanicek@nxp.com>