soc/intel/skylake: Make use of common SMM code for SKL

This patch ensures skylake soc is using common SMM code
from intel common block.

TEST=Build and boot soraka/eve

Change-Id: I8163dc7e18bb417e8c18a12628988959c128b3df
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Signed-off-by: Brandon Breitenstein <brandon.breitenstein@intel.com>
Reviewed-on: https://review.coreboot.org/22826
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/skylake/memmap.c

@@ -21,11 +21,11 @@
 #include <console/console.h>
 #include <device/device.h>
 #include <device/pci.h>
+#include <fsp/memmap.h>
 #include <intelblocks/ebda.h>
 #include <intelblocks/systemagent.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>
-#include <soc/smm.h>
 #include <soc/systemagent.h>
 #include <stdlib.h>