FSP platform microcode: Update to remove Kconfig variable

Move the Kconfig variable into a .h file - this does not need to be
in Kconfig.

Change-Id: I1db20790ddb32e0eb082503c6c60cbbefa818bb9
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7646
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

src/soc/intel/fsp_baytrail/Kconfig

@@ -102,12 +102,6 @@ config CPU_MICROCODE_CBFS_LOC
 	hex
 	default 0xfff10040
 
-config CPU_MICROCODE_CBFS_LEN
-	hex
-	default 0x19800
-	help
-	  This should be updated when the microcode patch changes.
-
 config CBFS_SIZE
 	hex
 	default 0x200000

src/soc/intel/fsp_baytrail/microcode/Makefile.inc

@@ -17,6 +17,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 #
 cpu_microcode-$(CONFIG_CPU_MICROCODE_CBFS_GENERATE) += microcode_blob.c
+CPPFLAGS_romstage += -I$(src)/soc/intel/fsp_baytrail/microcode
 
 ifneq ($(CONFIG_MICROCODE_INCLUDE_PATH),)
 ifneq ($(wildcard $(shell readlink -f "$(top)/$(CONFIG_MICROCODE_INCLUDE_PATH)")),)

src/soc/intel/fsp_baytrail/microcode/microcode_blob.c

@@ -19,7 +19,7 @@
 
 unsigned microcode[] = {
 
-/* Size is 0x19800 - update in Kconfig when the patch gets updated. */
+/* Size is 0x19800 - update in microcode_size.h when a patch gets changed. */
 #include "M0230672228.h"  // M0230672: Baytrail "Super SKU" B0/B1
 #include "M013067331E.h"  // M0130673: Baytrail I B2 / B3
 

src/soc/intel/fsp_baytrail/microcode/microcode_size.h

@@ -0,0 +1,2 @@
+/* Maximum size of the area that the FSP will search for the correct microcode */
+#define MICROCODE_REGION_LENGTH 0x19800