Fix too strict checks on subclass and interface of iad descriptor.

src/device/usbd.c

@@ -765,9 +765,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
         {
           // IAD's first interface number and class/subclass/protocol should match with opened interface
           TU_ASSERT(desc_itf_assoc->bFirstInterface   == desc_itf->bInterfaceNumber   &&
-                    desc_itf_assoc->bFunctionClass    == desc_itf->bInterfaceClass    &&
-                    desc_itf_assoc->bFunctionSubClass == desc_itf->bInterfaceSubClass &&
-                    desc_itf_assoc->bFunctionProtocol == desc_itf->bInterfaceProtocol);
+                    desc_itf_assoc->bFunctionClass    == desc_itf->bInterfaceClass);
 
           for(uint8_t i=1; i<desc_itf_assoc->bInterfaceCount; i++)
           {