soc/intel/xeon_sp: Include soc_util.h in Xeon-SP common codes

Different SoC generations might have different FSP header files. It is
recommended to put these uncommon header files in soc_util.h so that
Xeon-SP codes refer to soc_util.h to include them in a clean way.

TEST=intel/archercity CRB

Change-Id: Icfc20921efe00bc69b0c16c665f65f5baae4c309
Signed-off-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81229
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/xeon_sp/include/soc/chip_common.h

@@ -5,7 +5,7 @@
 
 #include <device/device.h>
 #include <device/path.h>
-#include <hob_iiouds.h>
+#include <soc/soc_util.h>
 
 union xeon_domain_path {
 	unsigned int domain_path;

src/soc/intel/xeon_sp/include/soc/util.h

@@ -4,7 +4,7 @@
 #define _XEON_SP_SOC_UTIL_H_
 
 #include <cpu/x86/msr.h>
-#include <hob_iiouds.h>
+#include <soc/soc_util.h>
 
 #define MEM_ADDR_64MB_SHIFT_BITS 26