cpu: Add DMTF id and family fields

For SMBIOS tables we need to know the CPU family as well as CPU IDs. This
patches allocates some space for them in the cpu device and populates it
on x86.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/cpu.h

@@ -21,6 +21,8 @@ struct cpu_platdata {
 	int cpu_id;
 	int ucode_version;
 	ulong device_id;
+	u16 family;		/* DMTF CPU Family */
+	u32 id[2];		/* DMTF CPU Processor IDs */
 };
 
 /* CPU features - mostly just a placeholder for now */