drivers/intel/fsp: update enable_mrc_cache with fast boot

When going from a configuration with fast boot disabled to one with
it enabled, ENABLE_MRC_CACHE was not being enabled properly.  This
forces it on with ENABLE_FSP_FAST_BOOT.

Change-Id: If7b6374e0c0a1d5403a50a1b0a958cea6f96cc88
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/5794
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/drivers/intel/fsp/Kconfig b/src/drivers/intel/fsp/Kconfig
index 3e16266..5e44046 100644
--- a/src/drivers/intel/fsp/Kconfig
+++ b/src/drivers/intel/fsp/Kconfig
@@ -54,6 +54,7 @@
 
 config ENABLE_FSP_FAST_BOOT
 	bool "Enable Fast Boot"
+	select ENABLE_MRC_CACHE
 	default n
 	help
 	  Enabling this feature will force the MRC data to be cached in NV
@@ -62,7 +63,7 @@
 
 config ENABLE_MRC_CACHE
 	bool
-	default ENABLE_FSP_FAST_BOOT
+	default n
 	help
 	  Enabling this feature will cause MRC data to be cached in NV storage.
 	  This can either be used for fast boot, or just because the FSP wants