soc/amd/cezanne: call boot_with_psp_timestamp

if VBOOT_STARTS_BEFORE_BOOTBLOCK is set, call boot_with_psp_timestamp to
migrate PSP timestamps into x86 timestamp table.

Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: I4d51802145263145d40908889de29147af54f50f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55405
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/amd/cezanne/bootblock.c

@@ -99,6 +99,13 @@ asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 	 */
 	base_timestamp /= tsc_freq_mhz();
 
+	if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
+		boot_with_psp_timestamp(base_timestamp);
+
+	/*
+	 * if VBOOT_STARTS_BEFORE_BOOTBLOCK is not selected or
+	 * previous step did nothing, proceed with normal bootblock main.
+	 */
 	bootblock_main_with_basetime(base_timestamp);
 }