feat(spmc): prevent read only xlat tables with the EL3 SPMC

If using the EL3 SPMC ensure that we don't mark the translation
tables as read only. The SPMC requires the ability to map and
unmap a partitions RX/TX buffers at runtime.

Signed-off-by: Sayanta Pattanayak <sayanta.pattanayak@arm.com>
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: Ibb78a6a2e3847ce4ec74ce81a9bb61ce34fec24c
1 file changed