chore(rme): get device memory regions for map/unmap

Set device memory map/unmap test structures based on
retrieved platform PCIe memory regions and remove
dependency on the second region.

Change-Id: If9d778a7d922eaf1ead3193d2916756fd74d77df
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
1 file changed