modules: mcux: allow to build with MCUX for NXP S32 devices

Some NXP S32 devices share common harwdware blocks with other non-S32
devices which are already supported using MCUX-based drivers. In order
to leverage existing support, allow to build with MCUX enabled for NXP
S32 family.

Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>