Stub out/replace missing functions from v1.9.0 HAL
diff --git a/32blit-stm32/Src/usbh_conf.c b/32blit-stm32/Src/usbh_conf.c
index 6a4a72a..7c3c635 100644
--- a/32blit-stm32/Src/usbh_conf.c
+++ b/32blit-stm32/Src/usbh_conf.c
@@ -186,8 +186,9 @@
   hhcd_USB_OTG_HS.Init.Sof_enable = DISABLE;

   hhcd_USB_OTG_HS.Init.low_power_enable = DISABLE;

   hhcd_USB_OTG_HS.Init.use_external_vbus = DISABLE;

-  hhcd_USB_OTG_HS.Init.NakCount = 3U;

-  hhcd_USB_OTG_HS.Init.NakTimeout = USBH_HS_NAK_TIMEOUT_MS;

+  // TODO Missing from STM32 H7 HAL v1.9.0

+  // hhcd_USB_OTG_HS.Init.NakCount = 3U;

+  // hhcd_USB_OTG_HS.Init.NakTimeout = USBH_HS_NAK_TIMEOUT_MS;

   if (HAL_HCD_Init(&hhcd_USB_OTG_HS) != HAL_OK)

   {

     Error_Handler( );

@@ -358,7 +359,9 @@
   */

 USBH_StatusTypeDef USBH_LL_ActivatePipe(USBH_HandleTypeDef * phost, uint8_t pipe)

 {

-  HAL_HCD_HC_Activate(phost->pData, pipe);

+  // TODO HAL_HCD_HC_Activate is missing from STM32 H7 HAL v1.9.0

+  // DoPing looks like - possibly - the correct alternative. Confirm!

+  USB_DoPing(phost->pData, pipe);

   return USBH_OK;

 }