Rename microcode include file to be model agnostic

In preparation to support CBFS hosted microcode blobs, this change
renames the wrapper include file containing the microcode to be
independent of CPU model.

Change-Id: If1a4963a52e5037a3a3495b90708ffc08b23f4c1
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/1294
Tested-by: build bot (Jenkins)

src/cpu/intel/model_206ax/bootblock.c

@@ -24,7 +24,7 @@
 #include <cpu/x86/mtrr.h>
 
 static const uint32_t microcode_updates[] = {
-	#include "x06_microcode.h"
+	#include "microcode_blob.h"
 };
 
 #include <cpu/intel/microcode/microcode.c>

src/cpu/intel/model_206ax/model_206ax_init.c

@@ -116,7 +116,7 @@ static acpi_cstate_t cstate_map[] = {
 };
 
 static const uint32_t microcode_updates[] = {
-	#include "x06_microcode.h"
+	#include "microcode_blob.h"
 };
 
 /* Convert time in seconds to POWER_LIMIT_1_TIME MSR value */