soc/intel/apollolake: Use ITSS common code

This patch uses common ITSS library to setup
itss irq.

Change-Id: Id265505cfc106668aea25ad93e114fe20736b700
Signed-off-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-on: https://review.coreboot.org/19236
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/chip.c

@@ -26,12 +26,13 @@
 #include <device/pci.h>
 #include <fsp/api.h>
 #include <fsp/util.h>
+#include <intelblocks/itss.h>
 #include <romstage_handoff.h>
 #include <soc/iomap.h>
+#include <soc/itss.h>
 #include <soc/cpu.h>
 #include <soc/flash_ctrlr.h>
 #include <soc/intel/common/vbt.h>
-#include <soc/itss.h>
 #include <soc/nvs.h>
 #include <soc/pci_devs.h>
 #include <spi-generic.h>