hal clean up

- replace tusb_hal_int_enable/disable to dcd_int_enable/disable,
hcd_int_enable/disable
- remove tusb_hal_init(), this will be part of dcd_init/hcd_init,
anything beyond dcd/hcd should be inited by bsp

src/portable/nordic/nrf5x/dcd_nrf5x.c

@@ -195,6 +195,18 @@ bool dcd_init (uint8_t rhport)
   return true;
 }
 
+void dcd_int_enable(uint8_t rhport)
+{
+  (void) rhport;
+  NVIC_EnableIRQ(USBD_IRQn);
+}
+
+void dcd_int_disable(uint8_t rhport)
+{
+  (void) rhport;
+  NVIC_DisableIRQ(USBD_IRQn);
+}
+
 void dcd_set_address (uint8_t rhport, uint8_t dev_addr)
 {
   (void) rhport;

src/portable/nordic/nrf5x/hal_nrf5x.c

@@ -128,27 +128,6 @@ static void hfclk_disable(void)
   nrf_clock_task_trigger(NRF_CLOCK_TASK_HFCLKSTOP);
 }
 
-
-/*------------------------------------------------------------------*/
-/* TUSB HAL
- *------------------------------------------------------------------*/
-bool tusb_hal_init(void)
-{
-  return true;
-}
-
-void tusb_hal_int_enable(uint8_t rhport)
-{
-  (void) rhport;
-  NVIC_EnableIRQ(USBD_IRQn);
-}
-
-void tusb_hal_int_disable(uint8_t rhport)
-{
-  (void) rhport;
-  NVIC_DisableIRQ(USBD_IRQn);
-}
-
 /*------------------------------------------------------------------*/
 /* Controller Start up Sequence (USBD 51.4 specs)
  *------------------------------------------------------------------*/