soc/intel/apollolake: use common FADT infrastructure

Instead of having the mainboards duplicate the same boilerplate
code utilize the common FADT infrastructure to reduce duplication.

Change-Id: If824619fd619433974e588050a933d2c19b97ec8
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/14779
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/apollolake/Kconfig

@@ -20,6 +20,7 @@ config CPU_SPECIFIC_OPTIONS
 	# Misc options
 	select C_ENVIRONMENT_BOOTBLOCK
 	select COLLECT_TIMESTAMPS
+	select COMMON_FADT
 	select HAVE_INTEL_FIRMWARE
 	select MMCONF_SUPPORT
 	select MMCONF_SUPPORT_DEFAULT