add TU_ prefix to compiler ATTR to prevent name conflict with application

src/class/midi/midi.h

@@ -42,7 +42,7 @@
 // FUNCTIONAL DESCRIPTOR (COMMUNICATION INTERFACE)
 //--------------------------------------------------------------------+
 /// Header Functional Descriptor (Communication Interface)
-typedef struct ATTR_PACKED
+typedef struct TU_ATTR_PACKED
 {
   uint8_t bLength            ; ///< Size of this descriptor in bytes.
   uint8_t bDescriptorType    ; ///< Descriptor Type, must be Class-Specific
@@ -52,7 +52,7 @@ typedef struct ATTR_PACKED
 }midi_desc_func_header_t;
 
 /// Union Functional Descriptor (Communication Interface)
-typedef struct ATTR_PACKED
+typedef struct TU_ATTR_PACKED
 {
   uint8_t bLength                  ; ///< Size of this descriptor in bytes.
   uint8_t bDescriptorType          ; ///< Descriptor Type, must be Class-Specific

src/class/midi/midi_device.h

@@ -82,7 +82,7 @@ static inline bool     tud_midi_write_flush     (void)
 //--------------------------------------------------------------------+
 // APPLICATION CALLBACK API (WEAK is optional)
 //--------------------------------------------------------------------+
-ATTR_WEAK void tud_midi_rx_cb(uint8_t itf);
+TU_ATTR_WEAK void tud_midi_rx_cb(uint8_t itf);
 
 //--------------------------------------------------------------------+
 // Internal Class Driver API