[PATCH] common: Make MMU_PGPROT depend on !SANDBOX

[Peng Fan]

On Fri, Sep 26, 2025 at 09:31:30AM -0600, Tom Rini wrote:
>While MMU_PGPROT is currently only functional for arm64 it can be
>extended for other real platforms as well. It does not however make
>sense for sandbox to enable and create dummy functions for. Make this
>depend on !SANDBOX.
>
>Signed-off-by: Tom Rini <trini at konsulko.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>