Merge pull request #1680 from LynnL4/port-stm32u5xx

Port stm32u5xx

src/portable/synopsys/dwc2/dwc2_stm32.h

@@ -82,6 +82,12 @@
   #define EP_MAX_FS       6
   #define EP_FIFO_SIZE_FS 1280
 
+#elif CFG_TUSB_MCU == OPT_MCU_STM32U5
+  #include "stm32u5xx.h"
+  #define USB_OTG_FS_PERIPH_BASE       USB_OTG_FS_BASE
+  #define EP_MAX_FS       6
+  #define EP_FIFO_SIZE_FS 1280
+
 #else
   #error "Unsupported MCUs"
 #endif