amd64_edac: Disable DRAM ECC injection on K8

K8 does not allow for an atomic RMW to a cacheline as F10h does so
disable the error injection interface for it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

drivers/edac/amd64_edac.c

@@ -2466,6 +2466,7 @@ static void set_mc_sysfs_attrs(struct mem_ctl_info *mci)
 	for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)
 		sysfs_attrs[i] = amd64_dbg_attrs[i];
 
+	if (boot_cpu_data.x86 >= 0x10)
 		for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)
 			sysfs_attrs[i] = amd64_inj_attrs[j];