Add correct endpoint count for GD32VF103
This controller family only supports USB FS with four endpoints
//#elif TU_CHECK_MCU(MM32F327X)
// #define DCD_ATTR_ENDPOINT_MAX not known yet
+//------------- GigaDevice -------------//
+#elif TU_CHECK_MCU(GD32VF103)
+ #define DCD_ATTR_ENDPOINT_MAX 4
+
#else
#warning "DCD_ATTR_ENDPOINT_MAX is not defined for this MCU, default to 8"
#define DCD_ATTR_ENDPOINT_MAX 8
