cpu/amd/fam10h-fam15h: Update Fam15h APIC config and startup sequence

This fixes Family 15h multiple package support; the previous code
hung in CAR setup and romstage when more than one CPU package was
installed for a variety of loosely related reasons.

TEST: Booted ASUS KGPE-D16 with two Opteron 6328 processors
and several different RDIMM configurations.

Change-Id: I171197c90f72d3496a385465937b7666cbf7e308
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12020
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
32 files changed