Use MMCONF for all AMD family 10 CPUs.

Use MMCONF for all AMD family 10 CPUs.

This fixes problems in AP init when multiple APs are trying to access
PCI config space. All Fam10 CPUs setup and support MMCONF.

Change-Id: I00a25bbf4e4152c89024f14a3c4c1c36b48d0128
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/455
Tested-by: build bot (Jenkins)
Reviewed-by: Alec Ari <neotheuser@ymail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>