add itf argument to hid API to support multiple instances

following API signature is changed:
- tud_hid_descriptor_report_cb()
- tud_hid_get_report_cb()
- tud_hid_set_report_cb()
- tud_hid_boot_mode_cb()
- tud_hid_set_idle_cb()

examples/device/hid_composite/src/main.c

@@ -239,9 +239,10 @@ void tud_hid_report_complete_cb(uint8_t itf, uint8_t const* report, uint8_t len)
 // Invoked when received GET_REPORT control request
 // Application must fill buffer report's content and return its length.
 // Return zero will cause the stack to STALL request
-uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen)
+uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen)
 {
   // TODO not Implemented
+  (void) itf;
   (void) report_id;
   (void) report_type;
   (void) buffer;
@@ -252,9 +253,10 @@ uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type,
 
 // Invoked when received SET_REPORT control request or
 // received data on OUT endpoint ( Report ID = 0, Type = 0 )
-void tud_hid_set_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
+void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
 {
   // TODO set LED based on CAPLOCK, NUMLOCK etc...
+  (void) itf;
   (void) report_id;
   (void) report_type;
   (void) buffer;

examples/device/hid_composite/src/usb_descriptors.c

@@ -82,8 +82,9 @@ uint8_t const desc_hid_report[] =
 // Invoked when received GET HID REPORT DESCRIPTOR
 // Application return pointer to descriptor
 // Descriptor contents must exist long enough for transfer to complete
-uint8_t const * tud_hid_descriptor_report_cb(void)
+uint8_t const * tud_hid_descriptor_report_cb(uint8_t itf)
 {
+  (void) itf;
   return desc_hid_report;
 }