Remove dead code from e820.cpp

Change-Id: I15ebd1901936f7f6e46f30d3bcc4d8b0c678d850
Fix broken numa affinity setting

Secondary cores were not correctly receiving their numa affinity. Now
this is all done in the acpi table parsing code.

Change-Id: I2a2ad8e9eac5bbfaeac82136cbd3b61071eea3d7