gd32f4xx: can: Rename preprocessor

The GigaDevices CAN driver uses similar names defined in Zephyr. This
add prefix '__' to solve the conflict.

Signed-off-by: HaiLong Yang <[email protected]>

Author: cameled

GD32F4XX/standard_peripheral/Include/gd32f4xx_can.h

@@ -594,10 +594,10 @@ typedef enum
 #define CAN_STATE_PENDING                  ((uint32_t)0x00000000U)      /*!< CAN pending */
 
 /* CAN communication mode */
-#define CAN_NORMAL_MODE                    ((uint8_t)0x00U)             /*!< normal communication mode */
-#define CAN_LOOPBACK_MODE                  ((uint8_t)0x01U)             /*!< loopback communication mode */
-#define CAN_SILENT_MODE                    ((uint8_t)0x02U)             /*!< silent communication mode */
-#define CAN_SILENT_LOOPBACK_MODE           ((uint8_t)0x03U)             /*!< loopback and silent communication mode */
+#define __CAN_NORMAL_MODE                  ((uint8_t)0x00U)             /*!< normal communication mode */
+#define __CAN_LOOPBACK_MODE                ((uint8_t)0x01U)             /*!< loopback communication mode */
+#define __CAN_SILENT_MODE                  ((uint8_t)0x02U)             /*!< silent communication mode */
+#define __CAN_SILENT_LOOPBACK_MODE         ((uint8_t)0x03U)             /*!< loopback and silent communication mode */
 
 /* CAN resynchronisation jump width */
 #define CAN_BT_SJW_1TQ                     ((uint8_t)0x00U)             /*!< 1 time quanta */
@@ -674,7 +674,7 @@ typedef enum
 #define CAN_FT_REMOTE                      ((uint32_t)0x00000002U)      /*!< remote frame */
 
 /* CAN timeout */
-#define CAN_TIMEOUT                        ((uint32_t)0x0000FFFFU)      /*!< timeout value */
+#define __CAN_TIMEOUT                      ((uint32_t)0x0000FFFFU)      /*!< timeout value */
 
 /* interrupt enable bits */
 #define CAN_INT_TME                        CAN_INTEN_TMEIE              /*!< transmit mailbox empty interrupt enable */