amd64_edac: Rename CPU PCI devices

Rename variables representing PCI devices to their BKDG names for faster
search and shorter, clearer code.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

diff --cc drivers/edac/amd64_edac.c
Simple merge

diff --cc drivers/edac/amd64_edac.h
Simple merge

diff --cc drivers/edac/amd64_edac_inj.c
Simple merge