cm3/common: Fixed the bit macros doing bad things with signed bit shifting

include/libopencm3/cm3/common.h

@@ -78,37 +78,37 @@
 #endif
 
 /* Generic bit definition */
-#define BIT0  (1<<0)
-#define BIT1  (1<<1)
-#define BIT2  (1<<2)
-#define BIT3  (1<<3)
-#define BIT4  (1<<4)
-#define BIT5  (1<<5)
-#define BIT6  (1<<6)
-#define BIT7  (1<<7)
-#define BIT8  (1<<8)
-#define BIT9  (1<<9)
-#define BIT10 (1<<10)
-#define BIT11 (1<<11)
-#define BIT12 (1<<12)
-#define BIT13 (1<<13)
-#define BIT14 (1<<14)
-#define BIT15 (1<<15)
-#define BIT16 (1<<16)
-#define BIT17 (1<<17)
-#define BIT18 (1<<18)
-#define BIT19 (1<<19)
-#define BIT20 (1<<20)
-#define BIT21 (1<<21)
-#define BIT22 (1<<22)
-#define BIT23 (1<<23)
-#define BIT24 (1<<24)
-#define BIT25 (1<<25)
-#define BIT26 (1<<26)
-#define BIT27 (1<<27)
-#define BIT28 (1<<28)
-#define BIT29 (1<<29)
-#define BIT30 (1<<30)
-#define BIT31 (1<<31)
+#define BIT0  (1U << 0U)
+#define BIT1  (1U << 1U)
+#define BIT2  (1U << 2U)
+#define BIT3  (1U << 3U)
+#define BIT4  (1U << 4U)
+#define BIT5  (1U << 5U)
+#define BIT6  (1U << 6U)
+#define BIT7  (1U << 7U)
+#define BIT8  (1U << 8U)
+#define BIT9  (1U << 9U)
+#define BIT10 (1U << 10U)
+#define BIT11 (1U << 11U)
+#define BIT12 (1U << 12U)
+#define BIT13 (1U << 13U)
+#define BIT14 (1U << 14U)
+#define BIT15 (1U << 15U)
+#define BIT16 (1U << 16U)
+#define BIT17 (1U << 17U)
+#define BIT18 (1U << 18U)
+#define BIT19 (1U << 19U)
+#define BIT20 (1U << 20U)
+#define BIT21 (1U << 21U)
+#define BIT22 (1U << 22U)
+#define BIT23 (1U << 23U)
+#define BIT24 (1U << 24U)
+#define BIT25 (1U << 25U)
+#define BIT26 (1U << 26U)
+#define BIT27 (1U << 27U)
+#define BIT28 (1U << 28U)
+#define BIT29 (1U << 29U)
+#define BIT30 (1U << 30U)
+#define BIT31 (1U << 31U)
 
 #endif