Fixes and Sandybridge support for lapic cpu init

- preprocessor macros should not use defined(CONFIG_*) but
  just CONFIG_*
- drop AMD CPU model 14XXX config variable use. Those do not exist.
- skip some delays on Sandybridge systems
- Count how long we're waiting for each AP to stop
- Skip speedstep specific CPU entries

Change-Id: I13db384ba4e28acbe7f0f8c9cd169954b39f167d
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/871
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/include/cpu/intel/speedstep.h

@@ -19,6 +19,9 @@
  * MA 02110-1301 USA
  */
 
+/* Magic value used to locate speedstep configuration in the device tree */
+#define SPEEDSTEP_APIC_MAGIC 0xACAC
+
 /* MWAIT coordination I/O base address. This must match
  * the \_PR_.CPU0 PM base address.
  */