cpu/stm32f7: remove conflicting enum from vendor header

cpu/stm32f7/include/vendor/stm32f7xx.h

@@ -160,31 +160,6 @@
   * @}
   */
 
-/** @addtogroup Exported_types
-  * @{
-  */
-typedef enum
-{
-  RESET = 0,
-  SET = !RESET
-} FlagStatus, ITStatus;
-
-typedef enum
-{
-  DISABLE = 0,
-  ENABLE = !DISABLE
-} FunctionalState;
-#define IS_FUNCTIONAL_STATE(STATE) (((STATE) == DISABLE) || ((STATE) == ENABLE))
-
-typedef enum
-{
-  ERROR = 0,
-  SUCCESS = !ERROR
-} ErrorStatus;
-
-/**
-  * @}
-  */
 
 /** @addtogroup Exported_macro
   * @{