x86: ivybridge: Perform Intel microcode update on boot

Microcode updates are stored in the device tree. Work through these and
apply any that are needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 6b40006..3bd60b7 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -118,6 +118,7 @@
 	COMPAT_SAMSUNG_EXYNOS_SYSMMU,	/* Exynos sysmmu */
 	COMPAT_PARADE_PS8625,		/* Parade PS8622 EDP->LVDS bridge */
 	COMPAT_INTEL_LPC,		/* Intel Low Pin Count I/F */
+	COMPAT_INTEL_MICROCODE,		/* Intel microcode update */
 
 	COMPAT_COUNT,
 };