soc: nxp_lpc: Enable mpu on the lpc54114 m4 core

Enables the arm v7m mpu on the lpc54114 m4 core. Reuses the mpu
configuration from the i.mx rt, which has the same mpu.

Tested on hardware with tests/kernel/mem_protect

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>