fix(usb): unique id DEVICE_ID3 on STM32L0 and STM32L1

On STM32L0 and STM32L1, `DEVICE_ID3` points at a reserved memory location
instead of the third word of the 96-bit unique device ID. The USB serial
number string is therefore derived from only 64 bits of the ID plus a
constant, and **devices from the same production lot and wafer enumerate with
byte-identical USB serial numbers**.

Signed-off-by: aron.cserkaszky <aron.cserkaszky@360.world>

Author: acseka360

libraries/USBDevice/inc/usbd_desc.h

@@ -26,9 +26,6 @@
 
   /* Exported types ------------------------------------------------------------*/
   /* Exported constants --------------------------------------------------------*/
-  #define  DEVICE_ID1                  (UID_BASE)
-  #define  DEVICE_ID2                  (UID_BASE + 0x4U)
-  #define  DEVICE_ID3                  (UID_BASE + 0x8U)
 
   /*
   * USB Billboard Class USER string desc Defines Template

libraries/USBDevice/src/usbd_desc.c

@@ -22,7 +22,8 @@
 #include "usbd_desc.h"
 #include "utils.h"
 #include <variant.h>
-
+#include "stm32yyxx_ll_utils.h"
+#include "stm32yyxx_ll_system.h"
 /* Private typedef -----------------------------------------------------------*/
 /* Private define ------------------------------------------------------------*/
 
@@ -444,13 +445,9 @@ uint8_t *USBD_Class_InterfaceStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *le
   */
 static void Get_SerialNum(void)
 {
-  uint32_t deviceserial0;
-  uint32_t deviceserial1;
-  uint32_t deviceserial2;
-
-  deviceserial0 = *(uint32_t *)DEVICE_ID1;
-  deviceserial1 = *(uint32_t *)DEVICE_ID2;
-  deviceserial2 = *(uint32_t *)DEVICE_ID3;
+  uint32_t deviceserial0 = LL_GetUID_Word0();
+  uint32_t deviceserial1 = LL_GetUID_Word1();
+  uint32_t deviceserial2 = LL_GetUID_Word2();
 
   deviceserial0 += deviceserial2;