mem-map: Setup memory for MDRT table
mem-map: Setup memory for MDRT table

Hostboot fills MDRT table after moving memory content from source to destination
memory. And OPAL relies on this table to extract the dump. We have to make sure
this table is intact. Hence define memory relative to SKIBOOT_BASE so that our
relocation doesn't overwrite this memory.

Signed-off-by: Vasant Hegde <a6d753843573f7bfed5075c1e875b0be8007a0ab@linux.vnet.ibm.com>
[oliver: rebased]
Signed-off-by: Oliver O'Halloran <3dfaff8fa6ae977f042064a112a6aac576279b9b@gmail.com>

qemu/skiboot,open-power/skiboot,legoater/skiboot,shenki/skiboot,open-power/skiboot,shenki/skiboot,qemu/skiboot,shenki/skiboot,open-power/skiboot,qemu/skiboot,open-power/skiboot,shenki/skiboot,open-power/skiboot,shenki/skiboot,legoater/skiboot,legoater/skiboot,qemu/skiboot,legoater/skiboot,qemu/skiboot,legoater/skiboot