x86 intel: Add Firmware Interface Table support

Haswell CPUs require a FIT table in the firmware. This commit
adds rudimentary support for a FIT table. The number of entries
in the table is based on a configuration option. The code only
generates a type 0 entry. A follow-on tool will need to be developed
to populate the FIT entries as well as checksumming the table.

Verified image has a FIT pointer and table when option is selected.

Change-Id: I3a314016a09a1cc26bf1fb5d17aa50853d2ef4f8
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2642
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig
index 5b24a8b..460b497 100644
--- a/src/cpu/intel/haswell/Kconfig
+++ b/src/cpu/intel/haswell/Kconfig
@@ -13,6 +13,7 @@
 	select CPU_MICROCODE_IN_CBFS
 	#select AP_IN_SIPI_WAIT
 	select TSC_SYNC_MFENCE
+	select CPU_INTEL_FIRMWARE_INTERFACE_TABLE
 
 config BOOTBLOCK_CPU_INIT
 	string