src/cpu/x86: Add helper mp_run_on_all_aps

Add a helper function mp_run_on_all_aps, it allows running a given
func on all APs excluding the BSP, with an added provision to run
func in serial manner per AP.

BUG=b:169114674

Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Change-Id: I74ee8168eb6380e346590f2575350e0a6b73856e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51271
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/cpu/x86/mp.h

@@ -125,6 +125,12 @@ enum {
 int mp_run_on_aps(void (*func)(void *), void *arg, int logical_cpu_num,
 		long expire_us);
 
+/*
+ * Runs func on all APs excluding BSP, with a provision to run calls in parallel
+ * or serially per AP.
+ */
+int mp_run_on_all_aps(void (*func)(void *), void *arg, long expire_us, bool run_parallel);
+
 /* Like mp_run_on_aps() but also runs func on BSP. */
 int mp_run_on_all_cpus(void (*func)(void *), void *arg);