Fix compile error with USB Serial + MIDI

teensy4/usb_desc.h

   #define CDC_RX_ENDPOINT       3
   #define CDC_TX_ENDPOINT       3
   #define CDC_ACM_SIZE          16
-  #define CDC_RX_SIZE           64
-  #define CDC_TX_SIZE           64
+  #define CDC_RX_SIZE_480       512
+  #define CDC_TX_SIZE_480       512
+  #define CDC_RX_SIZE_12        64
+  #define CDC_TX_SIZE_12        64
   #define MIDI_INTERFACE        2	// MIDI
   #define MIDI_NUM_CABLES       1
   #define MIDI_TX_ENDPOINT      4
   #define CDC_RX_ENDPOINT       3
   #define CDC_TX_ENDPOINT       3
   #define CDC_ACM_SIZE          16
-  #define CDC_RX_SIZE           64
-  #define CDC_TX_SIZE           64
+  #define CDC_RX_SIZE_480       512
+  #define CDC_TX_SIZE_480       512
+  #define CDC_RX_SIZE_12        64
+  #define CDC_TX_SIZE_12        64
   #define MIDI_INTERFACE        2	// MIDI
   #define MIDI_NUM_CABLES       4
   #define MIDI_TX_ENDPOINT      4
   #define CDC_RX_ENDPOINT       3
   #define CDC_TX_ENDPOINT       3
   #define CDC_ACM_SIZE          16
-  #define CDC_RX_SIZE           64
-  #define CDC_TX_SIZE           64
+  #define CDC_RX_SIZE_480       512
+  #define CDC_TX_SIZE_480       512
+  #define CDC_RX_SIZE_12        64
+  #define CDC_TX_SIZE_12        64
   #define MIDI_INTERFACE        2	// MIDI
   #define MIDI_NUM_CABLES       16
   #define MIDI_TX_ENDPOINT      4