neoverse-rd/rdv3r1: enable atu mmio
ATU MMIO service is used by PCIe setup module to access IO manager block configuration in AP's address space. Add the configuration file for ATU MMIO module and enable the build for scp_ram firmware.
Signed-off-by: Lokesh B V Lokesh.BV@Arm.com Change-Id: If480e72995a5b1255a87f909ac43408f8dc15f04