Marlin must override _BV for 32-bit masks!

Marlin/src/HAL/HAL_STM32F7/HAL_STM32F7.h

@@ -98,7 +98,7 @@
   #define NUM_SERIAL 1
 #endif
 
-#define _BV(bit) (1 << (bit))
+#define _BV(b) (1UL << (b))
 
 /**
  * TODO: review this to return 1 for pins that are not analog input

Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h

@@ -29,7 +29,7 @@
 #ifndef _FASTIO_STM32F7_H
 #define _FASTIO_STM32F7_H
 
-#define _BV(bit) (1 << (bit))
+#define _BV(b) (1UL << (b))
 
 #define READ(IO)              digitalRead(IO)
 #define WRITE(IO, v)          digitalWrite(IO,v)