soc/*: Report mp_init errors

* Increase log level from ERR to CRITICAL in run_ap_work().
* Print or return errors if mp_run_on_all_cpus() failed.

Tested on Supermicro X11SSH-TF.

Change-Id: I740505e3b6a46ebb3311d0e6b9669e7f929f9ab9
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34586
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/cpu/x86/mp_init.c

@@ -910,7 +910,7 @@ static int run_ap_work(struct mp_callback *val, long expire_us)
 			return 0;
 	} while (expire_us <= 0 || !stopwatch_expired(&sw));
 
-	printk(BIOS_ERR, "AP call expired. %d/%d CPUs accepted.\n",
+	printk(BIOS_CRIT, "CIRTICAL ERROR: AP call expired. %d/%d CPUs accepted.\n",
 		cpus_accepted, global_num_aps);
 	return -1;
 }