fl16: mark IAD as generic HID

Both works fine, but seems more corret to not label everything as
bootable keyboard.

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

tmk_core/protocol/usb_descriptor.c

@@ -647,8 +647,8 @@ const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor = {
         .FirstInterfaceIndex    = KEYBOARD_INTERFACE,
         .TotalInterfaces        = RP2040_RESET_INTERFACE, // It's the interface after this
         .Class                  = HID_CSCP_HIDClass,
-        .SubClass               = HID_CSCP_BootSubclass,
-        .Protocol               = HID_CSCP_KeyboardBootProtocol,
+        .SubClass               = 0x00, // HID_CSCP_BootSubclass,
+        .Protocol               = 0x00, // HID_CSCP_KeyboardBootProtocol,
         .IADStrIndex            = NO_DESCRIPTOR,
     },
 #ifndef KEYBOARD_SHARED_EP