added host set_config driver

to resolve control conflict with SET_CONFIGURE for class driver
- open will be called to open endpoint only
- set_config called later to initialized class driver

src/host/usbh_hcd.h

@@ -47,6 +47,8 @@
 //--------------------------------------------------------------------+
 // USBH-HCD common data structure
 //--------------------------------------------------------------------+
+
+// TODO move to usbh.c
 typedef struct {
   //------------- port -------------//
   uint8_t rhport;
@@ -95,7 +97,6 @@ typedef struct {
     // TODO merge ep2drv here, 4-bit should be sufficient
   }ep_status[CFG_TUH_EP_MAX][2];
 
-
 // Mutex for claiming endpoint, only needed when using with preempted RTOS
 #if CFG_TUSB_OS != OPT_OS_NONE
   osal_mutex_def_t mutexdef;