intel/fsp: Fix microcode including

IS_ENABLED() requires the full define (incl. CONFIG_ prefix)
but isn't needed here.

Change-Id: I91d504367c75ce3fcecc6fa2499afaa0896595d3
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/4646
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/cpu/intel/fsp_model_206ax/microcode_blob.c

@@ -18,7 +18,5 @@
  */
 
 unsigned microcode[] = {
-#if IS_ENABLED(SUPPORT_CPU_UCODE_IN_CBFS)
 #include "microcode_blob.h"
-#endif
 };