cpu/intel (non-FSP): Use microcode from blobs repository

Now that microcode has been added to blobs, use that one instead of
the one included in the tree. Microcode from the tree will be
removed in a subsequent patch. Since the microcode updates are blobs,
they belong in the blobs repository.

This change may introduce a build failure if the "Generate from tree"
microcode option is selected, but the blobs repository is not
enabled. We have to live with this for now, until microcode is moved
to blobs for all CPUs, at which point we may adjust Kconfig
accordingly.

Leave the FSP  cpu alone for now, as that will need approval from
SAGE.

Change-Id: Ia77ba2e26c083da092449b04ab2323b91a2ca15b
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4530
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/cpu/intel/model_f4x/microcode_blob.c

@@ -1,13 +1,3 @@
 unsigned microcode_updates_f4x[] = {
-	#include "microcode-1735-m01f480c.h"
-	#include "microcode-1460-m9df4305.h"
-	#include "microcode-2492-m02f480e.h"
-	#include "microcode-1470-m9df4703.h"
-	#include "microcode-1521-m5ff4807.h"
-	#include "microcode-1466-m02f4116.h"
-	#include "microcode-1469-m9df4406.h"
-	#include "microcode-1471-mbdf4117.h"
-	#include "microcode-1637-m5cf4a04.h"
-	#include "microcode-1462-mbdf4903.h"
-	#include "microcode-1498-m5df4a02.h"
+	#include "../../../../3rdparty/cpu/intel/model_f4x/microcode.h"
 };