move and add optional tusb_app_virt_to_phys/tusb_app_phys_to_virt

also add place holder for tusb_app_dcache_flush() and
tusb_app_dcache_invalidate()

src/osal/osal_none.h

@@ -35,6 +35,10 @@
 // TASK API
 //--------------------------------------------------------------------+
 
+#if CFG_TUH_ENABLED
+// currently only needed/available in host mode
+void osal_task_delay(uint32_t msec);
+#endif
 
 //--------------------------------------------------------------------+
 // Binary Semaphore API