Enable core1 && Fix portYield when called in ISR

lib/freertos/os_entry.c

@@ -80,7 +80,7 @@ int os_entry(int (*user_main)(int, char **))
         return -1;
     }
 
-    //core_sync_awaken((uintptr_t)os_entry_core1);
+    core_sync_awaken((uintptr_t)os_entry_core1);
     vTaskStartScheduler();
     return param.ret;
 }

lib/freertos/portable/port.c

@@ -197,7 +197,10 @@ void vPortExitCritical(void)
 
 void vPortYield()
 {
-    core_sync_request(uxPortGetProcessorId(), CORE_SYNC_SWITCH_CONTEXT);
+    if (uxPortIsInISR())
+        portYIELD_FROM_ISR();
+    else
+        core_sync_request(uxPortGetProcessorId(), CORE_SYNC_SWITCH_CONTEXT);
 }
 
 void vPortYieldFromISR(void)