soc/intel/xeon_sp: Enable FSP_ERROR_INFO_HOB handling

After calling FSP MemoryInit API, if there is an error, some FSPs
(such as SPR-SP FSP) is capable of generating FSP_ERROR_INFO_HOB.
Check existence of such a HOB and handle it accordingly.

Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: I612393ffac90815606f3f2544bc1518f6912e605
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71952
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>

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

@@ -10,5 +10,6 @@ void mainboard_memory_init_params(FSPM_UPD * mupd);
 void mainboard_rtc_failed(void);
 void save_dimm_info(void);
 void mainboard_ewl_check(void);
+void fsp_check_for_error(void);
 
 #endif /* _SOC_ROMSTAGE_H_ */

src/soc/intel/xeon_sp/romstage.c

@@ -17,6 +17,9 @@ void mainboard_romstage_entry(void)
 	printk(BIOS_DEBUG, "coreboot fsp_memory_init finished...\n");
 	mainboard_ewl_check();
 
+	if (CONFIG(ENABLE_FSP_ERROR_INFO))
+		fsp_check_for_error();
+
 	unlock_pam_regions();
 
 	save_dimm_info();