src/lib/bootblock.c: make bootblock_main_with_timestamp public

bootblock_main_with_timestamp function allows to proceed with existing
timestamp table. Apparently we never needed this, but Zork runs verstage
in the PSP before bootblock.

It'd be useful if we can grab timestamps for verstage from PSP and
merge with coreboot timestamps. Making it non-static will enable us to
do that.

BUG=b:154142138, b:159220781
BRANCH=zork
TEST=build firmware for zork

Change-Id: I061c3fbb652c40bafa0a007aa75f2a82680f5e0a
Signed-off-by: Kangheui Won <khwon@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45468
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/include/bootblock_common.h b/src/include/bootblock_common.h
index 97ccf96..da627d2 100644
--- a/src/include/bootblock_common.h
+++ b/src/include/bootblock_common.h
@@ -29,6 +29,8 @@
 asmlinkage void ap_bootblock_c_entry(void);
 
 void bootblock_main_with_basetime(uint64_t base_timestamp);
+void bootblock_main_with_timestamp(uint64_t base_timestamp,
+	struct timestamp_entry *timestamps, size_t num_timestamps);
 
 /* This is the argument structure passed from decompressor to bootblock. */
 struct bootblock_arg {
diff --git a/src/lib/bootblock.c b/src/lib/bootblock.c
index 7ee246e..1509c8c 100644
--- a/src/lib/bootblock.c
+++ b/src/lib/bootblock.c
@@ -23,7 +23,7 @@
  * entered from C code. This function assumes that the timer has already been
  * initialized, so it does not call init_timer().
  */
-static void bootblock_main_with_timestamp(uint64_t base_timestamp,
+void bootblock_main_with_timestamp(uint64_t base_timestamp,
 	struct timestamp_entry *timestamps, size_t num_timestamps)
 {
 	/* Initialize timestamps if we have TIMESTAMP region in memlayout.ld. */